by | Sep 27, 2025
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F, 25 C.
Lab tested with BPO cre
me hardener.
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
350,000-480,000 cps
Thixotropic Index n/a
Gel Time
Sample catalyzed at 3% with BPO
3-8 minutes
Weight per gallon 10.7 lbs.
The Duratec Vinyl Ester Putty is high quality, BPO catalyzed
putty, for repairing polyester, vinyl ester, and most epoxy
composites molds.
FEATURES
QUICK CURE
Catalyzes quickly with the
included BPO cr me hardener.
Surfaces are ready to sand in 20-
30 minutes!
HIGH BUILD
The putty can be troweled to inch with each application. Build thicker by repeating application.
LOW POROSITY
Strengthen repairs by reducing air porosity, allowing a solid, firm repair surface.
HIGH HEAT DISTORTION
An HDT of 300 F (150 C) resists thermal breakdown due to exposure to high exothermic or mold temperatures.
QUALITY CONTROL
Formulated to meet consistent standards, ensuring material for quality repairs each time.
DURATEC UNTINTED
MOLD REPAIR PUTTY
PRODUCT # 1804-007
SAFETY & HANDLING
Duratec Vinyl Ester Repair Putty is extremely flammable. Do not apply near sparks, open flames or heat. Keep
area ventilated. Do not smoke. Avoid continuous breathing of vapor. Du
ratec Vinyl Ester Repair Putty contains
ingredients which could
be harmful if mishandled. Contact with skin and eyes should be avoided and necessary
protective equipment and clothing should be worn. Individuals should wash with soap and water before eating or
drinking. All containers should be properly labeled to prevent accidental ingestion or improper disposal.
Individuals should reseal any partly used material back in the container. Store under cool, dry conditions and
away from open flames and high temperatures.
Liability/warranty statement: Our products are intended for sale to industrial and commercial customers. We
request that customers inspect and test our products before use and satisfy themselves as to contents and
suitability. All claim requests must be made in writing and are subject to review, including storage temperature
verification and retain evaluations. The exclusive remedy for all proven claims is replacement of our materials. In
no event shall we be liable for special, incidental or consequential damages, including damages caused in transit
(exworks terms). Nothing herein shall constitute a warranty, expressed or implied, including any warranty of
merchantability or fitness, nor is protection from any law or patent to be inferred. All patent and trademark rights
are reserved.
For more detailed instructions o n
storage, please see the MSDS sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.HAWKEYEIND.COM
COLOR OPTIONS
Black (1802-007)
Orange (1808- 007)
White (1814- 007)
FAST, EASY
SOLUTION
TO MOLD
MARKS
&
PART
REPAIR!
REVISED FEBRUARY 2023
DURATEC UNTINTED
VINYL ESTER PUTTY
APPLIC ATI
ON GUIDE | PR O DUC T #1804- 007
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
The repair surface should be clean, dry, and free from oil, grease, wax or other contaminants. The
laminate must be structurally sound. If the laminate has a crack, a repair will eventually crack in the same
place.
Ambient temperature should be excess of 68 F (20 C) to ensure a rapid and complete cure.
(1)Sand repair area with 80 grit. Use an angle grinder to bevel the edge of the gelcoat, avoiding an
abrupt edge. Grind down to the laminate to assure a great bond. *For repairs larger than a dime, drill
holes using a 1/8″ drill bit into the laminate at an angle.
(2)Wipe the area until it is free of dust using a clean rag. If working with epoxy, wipe away dust and then
water wash surface. Allow to fully dry before proceeding.
(3)Apply two layers of masking tape around the area that will be repaired.
(4)Estimate the amount of Mold Repair Putty that will be required. Use a putty knife to move twice that
amount (golf ball size) out of the container and onto cardboard or another smooth, sealed surface.
Catalyze
Catalyze the Mold Repair Putty with the BPO catalyst provided. The recommended catalyst amount is
3% by weight – correct measurements ensure correct results. A one-inch line of catalyst for a golf ball size
mound of putty is about right. (One-ounce of BPO is provided per quart of Duratec VE putty.)
Carefully stir the catalyst into the putty, avoid trapping air by folding the putty, moving the putty around
the board until fully
mixed.
Fill & Finish
Fill the repair area, and use the masking tape as a guide to assure the repair is over-filled. Tool in multiple
directions to make sure adhesion to all sides occurs.
Rough sand the repaired area as soon as possible, usually after about an hour. Leave the repair area slight
mounded. (You can use a heat gun to warm the repair and assure a full cure around 120 F.
Sand the mold into the proper shape and surface.
Buff and polish using Aqua Buff compound and polish to bring shine to match mold gloss.
Apply release and return the mold to use.
Please see Liability/Warranty Statement on Page 1
DURATEC UNTINTED
MOLD REPAIR PUTTY
TROUBLESHOOTING | PRODUC T #1
80
4-007
Problem Cause Solution
Cured putty
not glossy
Ambient temperature too cold.
Apply in 68 F (20 C) or warmer temperatures.
Cool putty prior to catalyzing.
Ambient temperature too warm.Putty gelstoo quick
BPO catalyst separated in the tube.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Too much catalyst used.
Massage BPO in tube prior to
catalyzing.
Putty under cured
Puttyjelly-like
Too little catalyst used.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Ambient temperature too cold. Apply in 68 F (20 C) or warmer
temperatures.
Please see Liability/Warranty Statement on Page 1
by | Sep 27, 2025
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F,
25 C.
Lab tested with BPO creme hardener.
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
3
50,000-480,000 cps
Thixotropic Index n/a
Gel Time
Sample catalyzed at 3%
with BPO
3-8 minutes
Weight per gallon 10.7 l .
The Duratec Vinyl Ester Putty is high quality, BPO catalyzed
putty, for repairing polyester, vinyl ester, and most epoxy
composites molds.
FEATURES
QUICK CURE
Catalyzes quickly with t
he
included BPO cr me hardener.
Surfaces are ready to sand in 20-
30 minutes!
HIGH BUILD
The putty can be troweled to
inch with each application. Buil
d
thicker by repeating application.
LOW POROSITY
Strengthen repairs by reducing air
porosity, allowing a solid, firm
repair surface.
HIGH HEAT DISTORTIO N
An HDT of 300 F (150 C) resists
thermal breakdown due t
o
exposure to high exothermic or
mold temperatures. Q UALITY CONTROL
Formulated to meet consistent standards, ensuring material for quality repairs each time.
DURATEC UNTINTED
MOLD REPAIR PUTTY
PRODUCT # 1804-007
SAFETY & HANDLING
Duratec Vinyl Ester Repair Putty is extremely flammable. Do not apply near
sparks, open flames or heat. Keep area ventilated. Do not smoke. Avoid continuous
breathing of vapor. Duratec Vinyl Ester Repair Putty contains ingredients which
could be harmful if mishandled. Contact with skin and eyes should be avoided and
necessary protective equipment and clothing should be worn. Individuals should
wash with soap and water before eating or drinking. All containers should be
properly labeled to prevent accidental ingestion or improper disposal. Individuals
should reseal any partly used material back in the container. Store under cool, dry
conditions and away from open flames and high temperatures.
For more detailed instructions on storage, please see the MSDS sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.DURATEC1.COM
COLOR OPTIONS
Black ( 1802-007)
Orange (1808- 007)
White (1814- 007)
FAST, EASY
SOLUTION TO
MOLD MARKS
& PART
REPAIR!
DURATE
C UNTINTED
VINYL ESTER PUTTY
AP
PLIC ATION GUIDE | PR O DUC T #1804- 007
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
The repair surface should be clean, dry, and free from oil, grease, wax or other contaminants. The
laminate must be structurally sound. If the laminate has a crack, a repair will eventually crack in the same
place.
Ambient temperature should be excess of 68 F (20 C) to ensure a rapid and complete cure.
(1) Sand repair area with 80 grit. Use an angle grinder to bevel the edge of the gelcoat, avoiding an
abrupt edge. Grind down to the laminate to assure a great bond. *For repairs larger than a dime, drill
holes using a 1/8″ drill bit into the laminate at an angle.
(2) Wipe the area until it is free of dust. Wash epoxy laminate with water. Wipe down polyester and vinyl
ester with laminate.
(3) Apply two layer of masking tape around the area that will be repaired.
(4) Estimate the amount of Mold Repair Putty that will be required. Use a putty knife to move twice that
amount (golf ball size) out of the container and onto cardboard or another smooth, sealed surface.
Catalyze
Catalyze the Mold Repair Putty with the BPO catalyst that is provided. One ounce per quart. The
recommended catalyst amount is 3% by weight – correct measurements ensure correct results. A one-
inch line of catalyst for a golf ball size mound of putty is about right.
Carefully stir the catalyst into the putty, avoid trapping air by folding the putty, moving the putty around
the board until full mixed.
Fill & Finish
Fill the repair area, and use the masking tape as a guide to assure the repair is over-filled. Tool in multiple
directions to make sure adhesion to all sides occurs.
Rough sand the repaired area as soon as possible, usually after about an hour. Leave the repair area slight
mounded. (You can use a heat gun to warm the repair and assure a full cure around 120 F.
Sand the mold into the proper shape and surface.
Buff and polish using Aqua Buff compound and polish to bring shine to match mold gloss.
Apply release and return the mold to use.
DURATE
C UNTINTED
MOLD REPAIR PUTTY
TROUBLESHOOTING | PRODUC T #1
80
4-007
Problem Cause Solution
Cured putty
not glossy
Ambient temperature too cold.
Apply in 65 F (18 C) or warmer temperatures.
Cool putty prior to catalyzing.
Ambient temperature too warm.Putty gelstoo quick
BPO catalyst separated in the tube.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Too much catalyst used.
Massage BPO in tube prior to
catalyzing.
Putty under cured
Puttyjelly-like
Too little catalyst used.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Ambient temperature too cold. Apply in 65 F (18 C) or warmer
temperatures.
by | Sep 27, 2025
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F,
25 C.
Lab tested with BPO creme hardener.
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
3
50,000-480,000 cps
Thixotropic Index n/a
Gel Time
Sample catalyzed at 3%
with BPO
3-8 minutes
Weight per gallon 10.7 l .
The Duratec Vinyl Ester Putty is high quality, BPO catalyzed
putty, for repairing polyester, vinyl ester, and most epoxy
composites molds.
FEATURES
QUICK CURE
Catalyzes quickly with t
he
included BPO cr me hardener.
Surfaces are ready to sand in 20-
30 minutes!
HIGH BUILD
The putty can be troweled to
inch with each application. Buil
d
thicker by repeating application.
LOW POROSITY
Strengthen repairs by reducing air
porosity, allowing a solid, firm
repair surface.
HIGH HEAT DISTORTIO N
An HDT of 300 F (150 C) resists
thermal breakdown due t
o
exposure to high exothermic or
mold temperatures. Q UALITY CONTROL
Formulated to meet consistent standards, ensuring material for quality repairs each time.
DURATEC UNTINTED
MOLD REPAIR PUTTY
PRODUCT # 1804-007
SAFETY & HANDLING
Duratec Vinyl Ester Repair Putty is extremely flammable. Do not apply near
sparks, open flames or heat. Keep area ventilated. Do not smoke. Avoid continuous
breathing of vapor. Duratec Vinyl Ester Repair Putty contains ingredients which
could be harmful if mishandled. Contact with skin and eyes should be avoided and
necessary protective equipment and clothing should be worn. Individuals should
wash with soap and water before eating or drinking. All containers should be
properly labeled to prevent accidental ingestion or improper disposal. Individuals
should reseal any partly used material back in the container. Store under cool, dry
conditions and away from open flames and high temperatures.
For more detailed instructions on storage, please see the MSDS sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.DURATEC1.COM
COLOR OPTIONS
Black ( 1802-007)
Orange (1808- 007)
White (1814- 007)
FAST, EASY
SOLUTION TO
MOLD MARKS
& PART
REPAIR!
DURATE
C UNTINTED
VINYL ESTER PUTTY
AP
PLIC ATION GUIDE | PR O DUC T #1804- 007
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
The repair surface should be clean, dry, and free from oil, grease, wax or other contaminants. The
laminate must be structurally sound. If the laminate has a crack, a repair will eventually crack in the same
place.
Ambient temperature should be excess of 68 F (20 C) to ensure a rapid and complete cure.
(1) Sand repair area with 80 grit. Use an angle grinder to bevel the edge of the gelcoat, avoiding an
abrupt edge. Grind down to the laminate to assure a great bond. *For repairs larger than a dime, drill
holes using a 1/8″ drill bit into the laminate at an angle.
(2) Wipe the area until it is free of dust. Wash epoxy laminate with water. Wipe down polyester and vinyl
ester with laminate.
(3) Apply two layer of masking tape around the area that will be repaired.
(4) Estimate the amount of Mold Repair Putty that will be required. Use a putty knife to move twice that
amount (golf ball size) out of the container and onto cardboard or another smooth, sealed surface.
Catalyze
Catalyze the Mold Repair Putty with the BPO catalyst that is provided. One ounce per quart. The
recommended catalyst amount is 3% by weight – correct measurements ensure correct results. A one-
inch line of catalyst for a golf ball size mound of putty is about right.
Carefully stir the catalyst into the putty, avoid trapping air by folding the putty, moving the putty around
the board until full mixed.
Fill & Finish
Fill the repair area, and use the masking tape as a guide to assure the repair is over-filled. Tool in multiple
directions to make sure adhesion to all sides occurs.
Rough sand the repaired area as soon as possible, usually after about an hour. Leave the repair area slight
mounded. (You can use a heat gun to warm the repair and assure a full cure around 120 F.
Sand the mold into the proper shape and surface.
Buff and polish using Aqua Buff compound and polish to bring shine to match mold gloss.
Apply release and return the mold to use.
DURATE
C UNTINTED
MOLD REPAIR PUTTY
TROUBLESHOOTING | PRODUC T #1
80
4-007
Problem Cause Solution
Cured putty
not glossy
Ambient temperature too cold.
Apply in 65 F (18 C) or warmer temperatures.
Cool putty prior to catalyzing.
Ambient temperature too warm.Putty gelstoo quick
BPO catalyst separated in the tube.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Too much catalyst used.
Massage BPO in tube prior to
catalyzing.
Putty under cured
Puttyjelly-like
Too little catalyst used.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Ambient temperature too cold. Apply in 65 F (18 C) or warmer
temperatures.
by | Sep 27, 2025
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F, 25 C.
La
b tested with BPO creme hardener.
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
350,
000-400,000 cps
Thixotropic Index n/a
Gel Time
Sample catalyzed at 3% with
BPO
3-8 minutes
Weight per gallon 10.8 lbs.
The Duratec Vinyl Ester Putty is high quality, BPO catalyzed
putty, for repairing polyester, vinyl ester, and most epoxy
composites molds.
DURATEC BLACK
MOLD REPAIR PUTTY
PRODUCT # 1802-007
SAFETY & HANDLING
Duratec Vinyl Ester Repair Putty is extremely flammable. Do not apply near
sparks, open flames or heat. Keep area ventilated. Do not smoke. Avoid continuous
breathing of vapor. Duratec Vinyl Ester Repair Putty contains ingredients which
could be harmful if mishandled. Contact with skin and eyes should be avoided and
necessary protective equipment and clothing should be worn. Individuals should
wash with soap and water before eating or drinking. All containers should be
properly labeled to prevent accidental ingestion or improper disposal. Individuals
should reseal any partly used material back in the container. Store under cool, dry
conditions and away from open flames and high temperatures.
For more detailed instructions on storage, please see the MSDS sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.DURATEC1.COM
COLOR OPTIONS
Untinted ( 1804-007)
Orange (1808- 007)
White (1814- 007)
FAST, EASY
S
OLUTION
TO M
OLD
MARKS &
P
ART
REPAIR!
FEATURES
QUICK CURE
Catalyzes quickly with the
included BPO cr me hardener.
Surfaces are ready to sand in 20-
30 minutes!
HIG H BUILD
The putty can be troweled to inch with each application. Build thicker by repeating application.
LOW POROSITY
Strengthen repairs by reducing air
porosity, allowing a solid, firm repair surface.
HIGH HEAT DISTORTION
An HDT of 300 F (150 C) resists thermal breakdown due to exposure to high exothermic or mold temperatures.
QU ALITY CONTROL
Formulated to meet consistent standards, ensuring material for quality repairs each time.
DURATEC BLACK
VINYL
ESTER PUTTY
AP
PLIC ATION GUIDE | PR ODUC T #1 802-007
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
The repair surface should be clean, dry, and free from oil, grease, wax or other contaminants. The
laminate must be structurally sound. If the laminate has a crack, a repair will eventually crack in the same
place.
Ambient temperature should be excess of 68 F (20 C) to ensure a rapid and complete cure.
(1)Sand repair area with 80 grit. Use an angle grinder to bevel the edge of the gelcoat, avoiding an
abrupt edge. Grind down to the laminate to assure a great bond. *For repairs larger than a dime, drill
holes using a 1/8″ drill bit into the laminate at an angle.
(2)Wipe the area until it is free of dust. Wash epoxy laminate with water. Wipe down polyester and vinyl
ester with laminate.
(3)Apply two layers of masking tape around the area that will be repaired.
(4)Estimate the amount of Mold Repair Putty that will be required. Use a putty knife to move twice that
amount (golf ball size) out of the container and onto cardboard or another smooth, sealed surface.
Catalyze
Catalyze the Mold Repair Putty with the BPO catalyst that is provided. One ounce per quart. The
recommended catalyst amount is 3% by weight – correct measurements ensure correct results. A one-
inch line of catalyst for a golf ball size mound of putty is about right.
Carefully stir the catalyst into the putty, avoid trapping air by folding the putty, moving the putty around
the board until fully
mixed.
Fill & Finish
Fill the repair area, and use the masking tape as a guide to assure the repair is over-filled. Tool in multiple
directions to make sure adhesion to all sides occurs.
Rough sand the repaired area as soon as possible, usually after about an hour. Leave the repair area slight
mounded. (You can use a heat gun to warm the repair and assure a full cure around 120 F.
Sand the mold into the proper shape and surface.
Buff and polish using Aqua Buff compound and polish to bring shine to match mold gloss.
Apply release and return the mold to use.
DURATE
C BLACK
MOLD REPAIR PUTTY
TROUBLESHOOTING |
PRODUC T #180
2-007
Problem Cause Solution
Cured putty
not glossy
Ambient temperature too cold.
Apply in 65 F (18 C) or warmer temperatures.
Cool putty prior to catalyzing.
Ambient temperature too warm.Putty gelstoo quick
BPO catalyst separated in the tube.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Too much catalyst used.
Massage BPO in tube prior to
catalyzing.
Putty under cured
Puttyjelly-like
Too little catalyst used.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Ambient temperature too cold. Apply in 65 F (18 C) or warmer
temperatures.
by | Sep 27, 2025
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F, 25 C.
La
b tested with BPO creme hardener.
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
350,
000-400,000 cps
Thixotropic Index n/a
Gel Time
Sample catalyzed at 3% with
BPO
3-8 minutes
Weight per gallon 10.8 lbs.
The Duratec Vinyl Ester Putty is high quality, BPO catalyzed
putty, for repairing polyester, vinyl ester, and most epoxy
composites molds.
DURATEC BLACK
MOLD REPAIR PUTTY
PRODUCT # 1802-007
SAFETY & HANDLING
Duratec Vinyl Ester Repair Putty is extremely flammable. Do not apply near
sparks, open flames or heat. Keep area ventilated. Do not smoke. Avoid continuous
breathing of vapor. Duratec Vinyl Ester Repair Putty contains ingredients which
could be harmful if mishandled. Contact with skin and eyes should be avoided and
necessary protective equipment and clothing should be worn. Individuals should
wash with soap and water before eating or drinking. All containers should be
properly labeled to prevent accidental ingestion or improper disposal. Individuals
should reseal any partly used material back in the container. Store under cool, dry
conditions and away from open flames and high temperatures.
For more detailed instructions on storage, please see the MSDS sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.DURATEC1.COM
COLOR OPTIONS
Untinted ( 1804-007)
Orange (1808- 007)
White (1814- 007)
FAST, EASY
S
OLUTION
TO M
OLD
MARKS &
P
ART
REPAIR!
FEATURES
QUICK CURE
Catalyzes quickly with the
included BPO cr me hardener.
Surfaces are ready to sand in 20-
30 minutes!
HIG H BUILD
The putty can be troweled to inch with each application. Build thicker by repeating application.
LOW POROSITY
Strengthen repairs by reducing air
porosity, allowing a solid, firm repair surface.
HIGH HEAT DISTORTION
An HDT of 300 F (150 C) resists thermal breakdown due to exposure to high exothermic or mold temperatures.
QU ALITY CONTROL
Formulated to meet consistent standards, ensuring material for quality repairs each time.
DURATEC BLACK
VINYL
ESTER PUTTY
AP
PLIC ATION GUIDE | PR ODUC T #1 802-007
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
The repair surface should be clean, dry, and free from oil, grease, wax or other contaminants. The
laminate must be structurally sound. If the laminate has a crack, a repair will eventually crack in the same
place.
Ambient temperature should be excess of 68 F (20 C) to ensure a rapid and complete cure.
(1)Sand repair area with 80 grit. Use an angle grinder to bevel the edge of the gelcoat, avoiding an
abrupt edge. Grind down to the laminate to assure a great bond. *For repairs larger than a dime, drill
holes using a 1/8″ drill bit into the laminate at an angle.
(2)Wipe the area until it is free of dust. Wash epoxy laminate with water. Wipe down polyester and vinyl
ester with laminate.
(3)Apply two layers of masking tape around the area that will be repaired.
(4)Estimate the amount of Mold Repair Putty that will be required. Use a putty knife to move twice that
amount (golf ball size) out of the container and onto cardboard or another smooth, sealed surface.
Catalyze
Catalyze the Mold Repair Putty with the BPO catalyst that is provided. One ounce per quart. The
recommended catalyst amount is 3% by weight – correct measurements ensure correct results. A one-
inch line of catalyst for a golf ball size mound of putty is about right.
Carefully stir the catalyst into the putty, avoid trapping air by folding the putty, moving the putty around
the board until fully
mixed.
Fill & Finish
Fill the repair area, and use the masking tape as a guide to assure the repair is over-filled. Tool in multiple
directions to make sure adhesion to all sides occurs.
Rough sand the repaired area as soon as possible, usually after about an hour. Leave the repair area slight
mounded. (You can use a heat gun to warm the repair and assure a full cure around 120 F.
Sand the mold into the proper shape and surface.
Buff and polish using Aqua Buff compound and polish to bring shine to match mold gloss.
Apply release and return the mold to use.
DURATE
C BLACK
MOLD REPAIR PUTTY
TROUBLESHOOTING |
PRODUC T #180
2-007
Problem Cause Solution
Cured putty
not glossy
Ambient temperature too cold.
Apply in 65 F (18 C) or warmer temperatures.
Cool putty prior to catalyzing.
Ambient temperature too warm.Putty gelstoo quick
BPO catalyst separated in the tube.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Too much catalyst used.
Massage BPO in tube prior to
catalyzing.
Putty under cured
Puttyjelly-like
Too little catalyst used.
Start with new putty and weigh out
catalyst for accuracy. (3% by weight).
Ambient temperature too cold. Apply in 65 F (18 C) or warmer
temperatures.
by | Sep 27, 2025
Gel Time
Sample b ased on a 100g m ass
catalyzed at 2 % with MEKP
10-16 minutes
Weight per gallon 8.1 lbs/gal
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #2
at 20 rpm
<100 cps
FEATURES
MULTI-FUNCTIONAL
For woods, veneers, concrete,
and other porous surfaces.
EASY TO
APPLY
Spray, roll,
or brush on as you r
application
sees fit.
RAPID CURING
Surfaces are ready
for topcoats in
one to two hours - some even
faster with no need to wait!
DEEP PE
NETRATION
Low
viscosity allow s sealer to
penetr
ate surfaces for a more
complet
e seal.
HI
GH COMPATIBILITY
Versatile
to work with your
substrate and
your choice in
topcoat lacquers,
urethanes,
polyesters,
vinyl esters, and most
epoxies.
S A FE TY & HANDL I NG
Duratec
Clear Vinyl Ester Sealer is extremely flammable. Do not apply near
sparks, open flames or heat. Keep area ventilated. Do not smoke. Avoid
continuous breathing of vapor. Duratec Clear Vinyl Ester Sealer contains
ingredients which could be harmful if mishandled. Contact with skin and eyes
should be avoided and necessary protective equipment and clothing should be
worn. Individuals should wash with soap and water before eating or drinking. All
containers should be properly labeled to prevent accidental ingestion or improper
disposal. Individuals should reseal any partly used material back in the container.
Store under cool, dry conditions and away from open flames and high
temperatures.
For more detailed
instructions on storage, please see the MSDS sheet.
DURATEC CLEAR
VINYL ESTER SEALER
P ROD UCT # 1800
*
DE S
CRI P TION
Duratec Clear Vinyl Ester Sealer is designed to provide
excellent performance in any situation
requiring high heat
resistance
and/or good corrosion resistance.
Designed to
promote better
adhesions for unsaturated polyester and vinyl
ester coatings.
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.DURATEC1.COM
SAVE TIME
AND ADD
QUALITY TO
YOUR
SURFACE
PROFILE!
POLYE ST E R
OP T IO N
823 Crystal Clear Sealer
The sealer for processes
with an HDT below 180 F.
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F, 25 C
Lab tested with Norox 925 MEKP
*
This product was once labeled as 1800A. The A was removed in 2020 but no changes were made to
t
he product formulation.
DURATEC CLEAR VINYL
ESTER SEALER
AP
PLIC ATION GUIDE | PR ODUC T # 1800
Prepare
T
emperature should be at least 64 F. Low temperatures extend cure time.
Ensure the surface is clean and free of both chemical and environmental contaminants. If needed,
slightly sand the surface with 120-220 grit and then wipe off surface with a clean (not tack) rag.
Mix
the Duratec Clear Vinyl Ester Sealer at a low speed for at least 3 minutes prior to catalyzing.
Catalyze before use using MEKP catalyst at 2% by weight. Norox 925 or 925H have yielded good
results. Due to the rapid gel time, catalyze only the amount that can be applied within 15-18 minutes.
NOTE: Higher temperatures yield a shorter pot life and gel time, while lower temperatures yield a
longer pot life and gel time.
Apply Sealer
Roll, brush, or spray the sealer on. If spraying, apply using air-assisted or airless spray at lowest
practical pressure. Wipe away any excess using a clean white cloth or paper towel. Do not use tack
rag.
Film thickness should be less than 2 mils on the surface.
Topcoating (Urethane, Polyester, Vinyl Esters)
In general, sealer will be ready to topcoat within an hour or two, but may be ready faster depending
on amount of sealer used and ambient temperature.
Sanding the sealer prior to topcoating is not necessary if the time between sealing and topcoating is
less than eight hours. If more than 8 hours have passed, we suggest sanding with 180-200 to provide
mechanical tooth for the bond.
Topcoating (Epoxy)
Adhesion between the Duratec Clear Vinyl Ester Sealer and epoxy is dependent on a mechanical
bond with the epoxy rather than a chemical bond. We advocate for a cure time of at least eight
hours. Abrade the surface with sandpaper (180-220) prior to topcoating with epoxy.
Duratec Clear Vinyl Ester Sealer is not designed for direct exposure to sunlight or other strong
UV sources.
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
DURATEC CLEAR VINY
L
E
STER SEALER
T
ROUBLESHOOTING | PR ODUC T #1800
Problem Cause Solution
Extended dry
or cure rate
Substrate too dense or hard.
Add up to one quart of acetone per
gallon of sealer.
Failure to totally cureIncompatibility with substrate.
Replace 1800 Sealer with Duratec
Polyurethane Sealer (5604-002
).
Spotty cure
Oily substrate.
Replace 1800 Sealer with Duratec Polyurethane Sealer (5604-002
).
by | Sep 27, 2025
Gel Time
Sample b ased on a 100g m ass
catalyzed at 2 % with MEKP
10-16 minutes
Weight per gallon 8.1 lbs/gal
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #2
at 20 rpm
<100 cps
FEATURES
MULTI-FUNCTIONAL
For woods, veneers, concrete,
and other porous surfaces.
EASY TO
APPLY
Spray, roll,
or brush on as you r
application
sees fit.
RAPID CURING
Surfaces are ready
for topcoats in
one to two hours - some even
faster with no need to wait!
DEEP PE
NETRATION
Low
viscosity allow s sealer to
penetr
ate surfaces for a more
complet
e seal.
HI
GH COMPATIBILITY
Versatile
to work with your
substrate and
your choice in
topcoat lacquers,
urethanes,
polyesters,
vinyl esters, and most
epoxies.
S A FE TY & HANDL I NG
Duratec
Clear Vinyl Ester Sealer is extremely flammable. Do not apply near
sparks, open flames or heat. Keep area ventilated. Do not smoke. Avoid
continuous breathing of vapor. Duratec Clear Vinyl Ester Sealer contains
ingredients which could be harmful if mishandled. Contact with skin and eyes
should be avoided and necessary protective equipment and clothing should be
worn. Individuals should wash with soap and water before eating or drinking. All
containers should be properly labeled to prevent accidental ingestion or improper
disposal. Individuals should reseal any partly used material back in the container.
Store under cool, dry conditions and away from open flames and high
temperatures.
For more detailed
instructions on storage, please see the MSDS sheet.
DURATEC CLEAR
VINYL ESTER SEALER
P ROD UCT # 1800
*
DE S
CRI P TION
Duratec Clear Vinyl Ester Sealer is designed to provide
excellent performance in any situation
requiring high heat
resistance
and/or good corrosion resistance.
Designed to
promote better
adhesions for unsaturated polyester and vinyl
ester coatings.
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.DURATEC1.COM
SAVE TIME
AND ADD
QUALITY TO
YOUR
SURFACE
PROFILE!
POLYE ST E R
OP T IO N
823 Crystal Clear Sealer
The sealer for processes
with an HDT below 180 F.
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F, 25 C
Lab tested with Norox 925 MEKP
*
This product was once labeled as 1800A. The A was removed in 2020 but no changes were made to
t
he product formulation.
DURATEC CLEAR VINYL
ESTER SEALER
AP
PLIC ATION GUIDE | PR ODUC T # 1800
Prepare
T
emperature should be at least 64 F. Low temperatures extend cure time.
Ensure the surface is clean and free of both chemical and environmental contaminants. If needed,
slightly sand the surface with 120-220 grit and then wipe off surface with a clean (not tack) rag.
Mix
the Duratec Clear Vinyl Ester Sealer at a low speed for at least 3 minutes prior to catalyzing.
Catalyze before use using MEKP catalyst at 2% by weight. Norox 925 or 925H have yielded good
results. Due to the rapid gel time, catalyze only the amount that can be applied within 15-18 minutes.
NOTE: Higher temperatures yield a shorter pot life and gel time, while lower temperatures yield a
longer pot life and gel time.
Apply Sealer
Roll, brush, or spray the sealer on. If spraying, apply using air-assisted or airless spray at lowest
practical pressure. Wipe away any excess using a clean white cloth or paper towel. Do not use tack
rag.
Film thickness should be less than 2 mils on the surface.
Topcoating (Urethane, Polyester, Vinyl Esters)
In general, sealer will be ready to topcoat within an hour or two, but may be ready faster depending
on amount of sealer used and ambient temperature.
Sanding the sealer prior to topcoating is not necessary if the time between sealing and topcoating is
less than eight hours. If more than 8 hours have passed, we suggest sanding with 180-200 to provide
mechanical tooth for the bond.
Topcoating (Epoxy)
Adhesion between the Duratec Clear Vinyl Ester Sealer and epoxy is dependent on a mechanical
bond with the epoxy rather than a chemical bond. We advocate for a cure time of at least eight
hours. Abrade the surface with sandpaper (180-220) prior to topcoating with epoxy.
Duratec Clear Vinyl Ester Sealer is not designed for direct exposure to sunlight or other strong
UV sources.
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
DURATEC CLEAR VINY
L
E
STER SEALER
T
ROUBLESHOOTING | PR ODUC T #1800
Problem Cause Solution
Extended dry
or cure rate
Substrate too dense or hard.
Add up to one quart of acetone per
gallon of sealer.
Failure to totally cureIncompatibility with substrate.
Replace 1800 Sealer with Duratec
Polyurethane Sealer (5604-002
).
Spotty cure
Oily substrate.
Replace 1800 Sealer with Duratec Polyurethane Sealer (5604-002
).
by | Sep 27, 2025
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
2200-2600 cps
Thixotropic Index min. 5
Gel Time
Sample based on a 100g mass
catalyzed at 2% with MEKP
15-22 minutes
Weight per gallon 11.18 lbs
Coverage per Gallon
10 mil thickness
250 micron thickness
100-115 ft 2
10.2-10.7 m2
KEY USES
Primer for patterns
Primer for boat hulls
Topcoat for
patterns
Use in
-mold or
post-a pply
All substrates (including
some metals and 3D
media with proper prep)
The Duratec Vinyl Ester Primer is based upon a highly functional resin that
brings unmatched strength and performance. Originally developed as the
ultimate barrier coat for boat hulls, the Duratec Vinyl Ester Primer has proven its
dynamic capability and solid value across many composite project uses.
QUICK CURE
Catalyze with MEKP Catalyst.
Rapid curing;
far faster than
epoxy resin systems. Primer will
be ready to sand in 1-4 hours,
depending on
thickness and
ambient temperature.
EASY
APPLICATION Spray
for a s
mooth, defect free
surface. C
an also be applied by
brush or
roller.
OSMOSIS AND BLISTER
RESISTANCE
Highly water and chemical
resistant. Proven performance
on more than 2000 boats for
over a decade.
HIGH BUILD
Up to 40 mils, 1000 microns, wet
on wet, without sagging on
vertical surfaces.
HIGH HDT – 280 F (138 C)
DURATEC GREY VINYL
ESTER PRIMER
PR O D U C T #1799- 006
SAFETY & HANDLING
Duratec Vi nyl Es
ter Primer is extremely fla mmable. Do n ot apply n ear spark
s,
open flames or heat. K eep area ventilated. D o not smoke. Avoi
d continuous
breathing of vapor.
Duratec Vi nyl Ester Primer contains ingredients which could
be harmful if
mishandled. Contact with ski n and eyes should be
avoided and
necessary protecti ve
equipment
and clothing should be worn.
Individuals should
wash with s
oa
p and water before eating or drinking. All containers should be
properly labeled to prevent accidental i
ngestion or improper disposal. Individuals
should reseal any partly used material
back in the container. Store under cool,
dry conditions and away from open flames and high temperatures.
For more detailed instructions on storage,
please see the MSDS sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BO X 415,
BLOOMINGTON, CA 92 316
WWW.HAWKEYEIND.COM
COLOR OPTIONS
Grey (1799-0 06)
Black
(1702-0 06)
White (1794-006)
PRODUCT PROPERTIES
All time calculations are based
on temperatures of 77 F, 25 C
Lab tested
h Norox 925H
FEATURES
REVISED FEB 2022
DURATEC GREY
VINYL ESTER PRIMER
APPLICATION GUIDE | PRODUCT #1799-006
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
Use either a paint shaker or a drill-mounted mixer. A paint stir stick will not be enough to mix up the
Duratec. Mix until all the pigment is dispersed and the Duratec Vinyl Ester Primer is free of lumps. Filter
through a cone
lter or lter sock.
Spray gun: an HVLP spray gun with a 2.2 2.4 mm tip, or a standard gelcoat gun. Vinyl Ester Primer is easier
to spray than gelcoat. Use a small tip and lower line pressure. Set up the gun to provide a ne spray.
Spray from 12-18 from the mold holding the gun at a 90 angle.
Catalyze
Catalyze the Duratec at 2.0 % by weight with a full strength MEKP, like Norox 925. Mix for one minute
(when using a cup gun). Only catalyze what can be sprayed in 12 minutes.
NOTE: Additional solvent is not needed for most spray guns. If solvent is required, do not add acetone.
Duratec Reducer 39UCE-3 is the best choice. Methyl Ethyl Ketone Solvent (MEK) will work for most users.
High quality urethane reducers are good choices. Lacquer thinner is not recommended.
If extended gel time is needed, check out Duratec Gel Time Extender. Gel-X is specially designed for
use in our primers and extends the pot life.
Spray
The first pass should be a dust coat that sets up for a minimum of two minutes before further application.
The dust coat should be a light fog, not a continuous film. NOTE: If your surface has pinholes or porosity,
the Duratec primer may need to be mechanically forced into the porosity. The first 2-3 mil pass can be
worked in with a soft squeegee to fill the holes.
Apply 5-7 mils and immediately apply another 5-7 mils in the opposite direction for a crosshatch effect.
Additional coats can be applied after a minimum of two minutes and while the surface is tacky.
For polyester/vinyl ester application: do not allow the primer to become tack-free between build coats. If
the primer becomes tack-free, allow it to cure completely, sand with 180 grit, and recoat.
Additional coats of 4-5 mils can be applied, again allowing a minimum of two minutes to out-gas. Twelve
mils will provide a nice finish. Up to 22 mils can be applied if the part requires aggressive post sanding.
The coating needs to be tacky for each build coat to bond. Cure time varies with temperature and air flow.
DURATEC GREY
VINYL ESTER PRIMER
APPLICATION GUIDE | PRODUCT #1799-006
WWW.HAWEYEIND.COM 909-546-1160 HAWKEYESALES@HAWKEYEIND.COM PO BOX 415, BLOOMINGTON, CA 92316
Limited/ warranty statement: Our products are intended for sale to industrial and commercial customers. We request that customers inspect and test our
products before use and satisfy themselves as to contents and suitability. Nothing herein shall constitute a warranty, expressed or implied, including any
warranty of merchantability or fitness, nor is protection from any law or patent to be inferred. All patent rights are reserved. The exclusive remedy for all
proven claims is replacement of our materials and in no event shall we be liable for special, incidental or consequential damages. www.hawke e L Q G. F R P
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
For epoxy, follow the steps provided – however, note that epoxy laminating systems require a tack free
surface. Increased heat up to 120 F will speed this process. Remember the adhesion comes from the
epoxy. Test the bond between the Duratec and your epoxy blend to assure good adhesion.
Sand & Polish
Work through sandpaper grits from 400-1500, removing only the Duratec necessary to achieve a
smooth
at pro le. Wet sanding yields best results. We advocate a sanding guide coat or sanding dye.
Because of the tough, scratch resistant nature of the Duratec regular automotive compounds may not
be aggressive enough to remove sanding scratches. We advocate the use of Aqua Buf as described
belo
w.
Allow at least eight hours between the start of sanding and the start of compounding. Pre-sand out
any gas.
Beginning with Aqua Buf 1000F
, remove the scratches, using a wool pad and mist bottle as your
lubricant.
Exceptional nal gloss will be achieved with Aqua Buf 2000 with a cotton/ wool blend pad. Again use
a mist bottle t
o lubricate and cool the part as you polish the part. Finish with a foam pad for outstand-
ing results.
DURATEC GREY
VINYL ESTER PRIMER
TROUBLESHOOTING | PRODUCT #1799-006
Problem Cause Solution
Alligatoring
Not enough catalyst used.
Substrate/primer incompatibility or
chemical reaction.
Check for proper catalyst levels.
Expose surface to higher temperature
before spraying when ambient temp
is below 64 F , 18 C.
Primer sprayed on cold surface.
Check compatibility of surface of product.
Blisters
Substrate not cured, gassing
underneath primer.
Completely cure putties, pastes and
compounds before applying primer.
Cracking Primer spray too thickly, too fast .
Increase the number of passes, adding dwell time between coats.
Fisheyes
Substrate contaminated.
Do not use a tack rag . Ensure rag does
not leave contaminant on surface.
Spray in a clean area to minimize airborne
dust, water, waxes, and/or silicones.
Spray with dry fltered air.
Contamination in the air.
Contamination in the line.
Orange Peel
Spray equipment set up incorrectly.
Spray pressure incorrect.
Pot pressure incorrect.
Follow the instructions for equipment
set up.
Set pressure at 34-40 psi.
Set pressure at 10-12 psi
Pattern surface
sticks to mold
upon release
Pinholes
Porosity
Improper release preparation.
Follow manufacturer s instructions
when applying release materials.
Primer not fully cured before
compounding and polishing.
Excess gel time for tooling gel coat.
Substrate porosity.
Fill porous areas with product using
squeegee, brush or roller before spraying.
Follow instructions in the application
guide for pattern surfacing.
Follow manufacturer s recs for gel time.
Acetone used as thinner.
Spray pressure too high
Spray orifce too small.
Reduce pressure to 34-40 psi.
Use larger orifce.
Use slower solvent such as MEK or
Duratec Reducer.
by | Sep 27, 2025
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
2200-2600 cps
Thixotropic Index min. 5
Gel Time
Sample based on a 100g mass
catalyzed at 2% with MEKP
15-22 minutes
Weight per gallon 11.18 lbs
Coverage per Gallon
10 mil thickness
250 micron thickness
100-115 ft 2
10.2-10.7 m2
KEY USES
Primer for patterns
Primer for boat hulls
Topcoat for
patterns
Use in
-mold or
post-a pply
All substrates (including
some metals and 3D
media with proper prep)
The Duratec Vinyl Ester Primer is based upon a highly functional resin that
brings unmatched strength and performance. Originally developed as the
ultimate barrier coat for boat hulls, the Duratec Vinyl Ester Primer has proven its
dynamic capability and solid value across many composite project uses.
QUICK CURE
Catalyze with MEKP Catalyst.
Rapid curing;
far faster than
epoxy resin systems. Primer will
be ready to sand in 1-4 hours,
depending on
thickness and
ambient temperature.
EASY
APPLICATION Spray
for a s
mooth, defect free
surface. C
an also be applied by
brush or
roller.
OSMOSIS AND BLISTER
RESISTANCE
Highly water and chemical
resistant. Proven performance
on more than 2000 boats for
over a decade.
HIGH BUILD
Up to 40 mils, 1000 microns, wet
on wet, without sagging on
vertical surfaces.
HIGH HDT – 280 F (138 C)
DURATEC GREY VINYL
ESTER PRIMER
PR O D U C T #1799- 006
SAFETY & HANDLING
Duratec Vi nyl Es
ter Primer is extremely fla mmable. Do n ot apply n ear spark
s,
open flames or heat. K eep area ventilated. D o not smoke. Avoi
d continuous
breathing of vapor.
Duratec Vi nyl Ester Primer contains ingredients which could
be harmful if
mishandled. Contact with ski n and eyes should be
avoided and
necessary protecti ve
equipment
and clothing should be worn.
Individuals should
wash with s
oa
p and water before eating or drinking. All containers should be
properly labeled to prevent accidental i
ngestion or improper disposal. Individuals
should reseal any partly used material
back in the container. Store under cool,
dry conditions and away from open flames and high temperatures.
For more detailed instructions on storage,
please see the MSDS sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BO X 415,
BLOOMINGTON, CA 92 316
WWW.HAWKEYEIND.COM
COLOR OPTIONS
Grey (1799-0 06)
Black
(1702-0 06)
White (1794-006)
PRODUCT PROPERTIES
All time calculations are based
on temperatures of 77 F, 25 C
Lab tested
h Norox 925H
FEATURES
REVISED FEB 2022
DURATEC GREY
VINYL ESTER PRIMER
APPLICATION GUIDE | PRODUCT #1799-006
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
Use either a paint shaker or a drill-mounted mixer. A paint stir stick will not be enough to mix up the
Duratec. Mix until all the pigment is dispersed and the Duratec Vinyl Ester Primer is free of lumps. Filter
through a cone
lter or lter sock.
Spray gun: an HVLP spray gun with a 2.2 2.4 mm tip, or a standard gelcoat gun. Vinyl Ester Primer is easier
to spray than gelcoat. Use a small tip and lower line pressure. Set up the gun to provide a ne spray.
Spray from 12-18 from the mold holding the gun at a 90 angle.
Catalyze
Catalyze the Duratec at 2.0 % by weight with a full strength MEKP, like Norox 925. Mix for one minute
(when using a cup gun). Only catalyze what can be sprayed in 12 minutes.
NOTE: Additional solvent is not needed for most spray guns. If solvent is required, do not add acetone.
Duratec Reducer 39UCE-3 is the best choice. Methyl Ethyl Ketone Solvent (MEK) will work for most users.
High quality urethane reducers are good choices. Lacquer thinner is not recommended.
If extended gel time is needed, check out Duratec Gel Time Extender. Gel-X is specially designed for
use in our primers and extends the pot life.
Spray
The first pass should be a dust coat that sets up for a minimum of two minutes before further application.
The dust coat should be a light fog, not a continuous film. NOTE: If your surface has pinholes or porosity,
the Duratec primer may need to be mechanically forced into the porosity. The first 2-3 mil pass can be
worked in with a soft squeegee to fill the holes.
Apply 5-7 mils and immediately apply another 5-7 mils in the opposite direction for a crosshatch effect.
Additional coats can be applied after a minimum of two minutes and while the surface is tacky.
For polyester/vinyl ester application: do not allow the primer to become tack-free between build coats. If
the primer becomes tack-free, allow it to cure completely, sand with 180 grit, and recoat.
Additional coats of 4-5 mils can be applied, again allowing a minimum of two minutes to out-gas. Twelve
mils will provide a nice finish. Up to 22 mils can be applied if the part requires aggressive post sanding.
The coating needs to be tacky for each build coat to bond. Cure time varies with temperature and air flow.
DURATEC GREY
VINYL ESTER PRIMER
APPLICATION GUIDE | PRODUCT #1799-006
WWW.HAWEYEIND.COM 909-546-1160 HAWKEYESALES@HAWKEYEIND.COM PO BOX 415, BLOOMINGTON, CA 92316
Limited/ warranty statement: Our products are intended for sale to industrial and commercial customers. We request that customers inspect and test our
products before use and satisfy themselves as to contents and suitability. Nothing herein shall constitute a warranty, expressed or implied, including any
warranty of merchantability or fitness, nor is protection from any law or patent to be inferred. All patent rights are reserved. The exclusive remedy for all
proven claims is replacement of our materials and in no event shall we be liable for special, incidental or consequential damages. www.hawke e L Q G. F R P
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
For epoxy, follow the steps provided – however, note that epoxy laminating systems require a tack free
surface. Increased heat up to 120 F will speed this process. Remember the adhesion comes from the
epoxy. Test the bond between the Duratec and your epoxy blend to assure good adhesion.
Sand & Polish
Work through sandpaper grits from 400-1500, removing only the Duratec necessary to achieve a
smooth
at pro le. Wet sanding yields best results. We advocate a sanding guide coat or sanding dye.
Because of the tough, scratch resistant nature of the Duratec regular automotive compounds may not
be aggressive enough to remove sanding scratches. We advocate the use of Aqua Buf as described
belo
w.
Allow at least eight hours between the start of sanding and the start of compounding. Pre-sand out
any gas.
Beginning with Aqua Buf 1000F
, remove the scratches, using a wool pad and mist bottle as your
lubricant.
Exceptional nal gloss will be achieved with Aqua Buf 2000 with a cotton/ wool blend pad. Again use
a mist bottle t
o lubricate and cool the part as you polish the part. Finish with a foam pad for outstand-
ing results.
DURATEC GREY
VINYL ESTER PRIMER
TROUBLESHOOTING | PRODUCT #1799-006
Problem Cause Solution
Alligatoring
Not enough catalyst used.
Substrate/primer incompatibility or
chemical reaction.
Check for proper catalyst levels.
Expose surface to higher temperature
before spraying when ambient temp
is below 64 F , 18 C.
Primer sprayed on cold surface.
Check compatibility of surface of product.
Blisters
Substrate not cured, gassing
underneath primer.
Completely cure putties, pastes and
compounds before applying primer.
Cracking Primer spray too thickly, too fast .
Increase the number of passes, adding dwell time between coats.
Fisheyes
Substrate contaminated.
Do not use a tack rag . Ensure rag does
not leave contaminant on surface.
Spray in a clean area to minimize airborne
dust, water, waxes, and/or silicones.
Spray with dry fltered air.
Contamination in the air.
Contamination in the line.
Orange Peel
Spray equipment set up incorrectly.
Spray pressure incorrect.
Pot pressure incorrect.
Follow the instructions for equipment
set up.
Set pressure at 34-40 psi.
Set pressure at 10-12 psi
Pattern surface
sticks to mold
upon release
Pinholes
Porosity
Improper release preparation.
Follow manufacturer s instructions
when applying release materials.
Primer not fully cured before
compounding and polishing.
Excess gel time for tooling gel coat.
Substrate porosity.
Fill porous areas with product using
squeegee, brush or roller before spraying.
Follow instructions in the application
guide for pattern surfacing.
Follow manufacturer s recs for gel time.
Acetone used as thinner.
Spray pressure too high
Spray orifce too small.
Reduce pressure to 34-40 psi.
Use larger orifce.
Use slower solvent such as MEK or
Duratec Reducer.
by | Sep 27, 2025
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #5
at 2.5 rpm
2200 – 2600 cps
Thixotropic Index min. 5.5
Gel Time
Sample based on a 100g mass
catalyzed at 2% with MEKP
15-20 minutes
Weight per gallon 11.20 lbs
Coverage per Gallon
10 mil thickness
100-115 sq. feet
KEY USES
The Duratec Vinyl Ester Primer is based upon a highly functional resin that
brings unmatched strength and performance. Originally developed as the
ultimate barrier coat for boat hulls, the Duratec Vinyl Ester Primer has proven its
dynamic capability and solid value across many composite project uses.
DURATEC WHITE
VINYL ESTER PRIMER
PR O D U C T #1794 -0 06
SAFETY & HANDLING
Duratec Vi nyl Ester Pri m
er is extremely fla mmable. Do n ot apply n ear sparks,
open flames or
heat. K eep area ventilated. D o not smoke. Avoid continuous
breathing of
vapor. Duratec Vi ny
l Ester Primer contains ingredients which could
be harmful if mishandled. Contact
with skin and eyes should be avoided and
necessary prot
ective equipment and clothing s
hould be wor
n. Individuals shoul
d
wash with soap and
wat
er before eating or drinking. All containers should be
properly labeled to prevent accidental ingesti on or im
proper disposal. Individuals
should reseal any partly used material back in the container. Store under cool,
dry
conditions and away from open flames and high temperatures.
For more detailed instructions on storage, please see the MSDS
sheet.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.HAWKEYEIND.COM
COLOR OPTIONS
Grey (1799-0 06)
Black (1702-0 06)
White (1794-006)
PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F, 25 C
Lab tested with Norox 925H
Primer for patterns
Primer for boat
hulls
Topcoat for patterns
Use in-mold or post-apply
All su
bstrates (including
some metals and 3D
media with proper prep)
QUICK CURE
Catalyze with
MEKP Catalyst.
Rapid curing;
far faster than
epoxy resin systems. Primer will
be ready to sand i
n 1-4 hours,
dependi
ng on thi
ckness and
ambient temperature.
EASY APPLICATION Spray
for a
smooth, defect free
surface.
Can also be applied by
brush or
roller.
OSMOSIS AND BLISTER
RESISTANCE
Highly water and chemical
resistant. Proven performance
on more than 2000 boats for
over a decade.
HIGH BUILD
Up to 40 mils, 1000 microns, wet
on wet, without sagging on
vertical surfaces.
HIGH HDT – 280 F (138 C)
REVISED FEBRUARY 2024
FEATURES
DURATEC WHITE
VINYL ESTER PRIMER
AP
PLIC ATION GUIDE | PR ODUC T #1794-006
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Prepare
Use either a paint shaker or a drill-mounted mixer. A paint stir stick will not be enough to mix up the
Duratec. Mix until all the pigment is dispersed and the Duratec Vinyl Ester Primer is free of lumps. Filter
through a cone filter or filter sock.
Spray gun: an HVLP spray gun with a 2.2 2.5 mm tip, or a standard gelcoat gun. Vinyl Ester Primer is easier to
spray than gelcoat. Use a small tip and lower line pressure. Set up the gun to provide a fine spray.
Spray from 12-18 from the mold holding the gun at a 90 angle.
Catalyze
Catalyze the Duratec at 2.0 % by weight with a full strength MEKP, like Norox 925. Mix for one minute
(when using a cup gun). Only catalyze what can be sprayed in 12 minutes.
NOTE: Additional solvent is not needed for most spray guns. If solvent is required Duratec Reducer
39UCE-3 is the best choice. Methyl Ethyl Ketone Solvent (MEK) will work for most users. High quality
urethane reducers are good choices. Lacquer thinners and acetone are not recommended.
If extended gel time is needed, check out Duratec Gel Time Extender. Gel-X is specially designed for
use in our primers and extends the pot life.
Spray
The Duratec may need to be mechanically forced into severe porosity. The first 2-3 mil pass can be worked
with a soft squeegee to fill the holes. The first pass should
be a dust coat that sets up for a minimum of
two minutes before further application. The dust coat should be a light fog, not a continuous film.
Apply 5-7 mils and immediately apply another 5-7 mils in the opposite direction for a crosshatch effect.
Additional coats can be applied after a minimum of two minutes and while the surface is tacky.
For polyester/vinyl ester application: do not allow the primer to become tack-free between build coats. If
the primer becomes tack-free, allow it to cure completely, sand with 180 grit, and recoat.
Additional coats of 4-5 mils can be applied, again allowing a minimum of two minutes to out-gas. Twelve
mils will provide a nice finish. Up to 22 mils can be applied if the part requires aggressive post sanding.
The coating needs to be tacky for each build coat to bond. Cure time varies with temperature and air flow.
DURATEC WHITE
VINYL ESTER PRIMER
AP
PLIC ATION GUIDE | PR ODUC T #1794-006
Limited/ warranty statement: Our products are intended for sale to industrial and commercial customers. We request that customers inspect and test our
products before use and satisfy themselves as to contents and suitability. Nothing herein shall constitute a warranty, expressed or implied, including any
warranty of merchantability or fitness, nor is protection from any law or patent to be inferred. All patent rights are reserved. The exclusive remedy for all
proven claims is replacement of our materials and in no event shall we be liable for special, incidental or consequential damages.
WWW.DURATEC1.COM 909-546-1160 HAWKEYESALES@HAWKEYEIND.COM PO BOX 415, BLOOMINGTON, CA 92316www. K D Z N H H L Q G.com
The following use instructions are broad to address multiple applications. We recommend testing for product
compatability with your process. Please contact our Tech Team at (909) 546-1160 with any questions.
PLEASE NOTE
Sand & Buff
Work through sandpaper grits from 400- 1500, removing only the Duratec necessary to achieve a smooth at pro le. Wet sanding yields best results. We advocate a sanding guide coat or sanding dye.
Because of the tough, scratch resistant nature of the Duratec regular automotive compounds may not
be aggressive enough to remove sanding scratches. We advocate the use of Aqua Buf as described
below.
Allow at least eight hours between the start of sanding and the start of compounding. Pre-sand out
any gas.
Beginning with Aqua Buf 1000F, remove the scratches, using a wool pad and mist bottle as your
lubricant.
Exceptional nal gloss will be achieved with Aqua Buf 2000 with a cotton/ wool blend pad. Again use
a mist bottle to lubricate and cool the part as you polish the part. Finish with a foam pad for outstand-
ing results.
For epoxy, follow the steps provided – however, note that epoxy laminating systems require a tack free
surface. Increased heat up to 120 F will speed this process. Remember the adhesion comes from the
epoxy. Test the bond between the Duratec and your epoxy blend to assure good adhesion.
DURATEC WHITE
VINYL
ESTER PRIMER
T
ROUBLESHOOTING | PR O DUC T #1 794-006
Problem Cause Solution
Alligatoring
Not enough catalyst used.
Substrate/primer incompatibility or
chemical reaction.
Check for proper catalyst levels.
Expose surface to higher temperature
before spraying when ambient temp
of below 64 F , 18 C.
Primer sprayed on cold surface.
Check compatibility of surface of product.
Blisters
Substrate not cured, gassing
underneath primer.
Completely cure putties, pastes and
compounds before applying primer.
Cracking Primer spray too thickly, too fast .
Increase the number of passes, adding dwell time between coats.
Fisheyes
Substrate contaminated.
Do not use a tack rag . Ensure rag does
not leave contaminant on surface.
Spray in a clean area to minimize airborne
dust, water, waxes, and/or silicones.
Spray with dry fltered air.
Contamination in the air.
Contamination in the line.
Orange Peel
Spray equipment set up incorrectly.
Spray pressure incorrect.
Pot pressure incorrect.
Follow the instructions for equipment
set up.
Set pressure at 34-40 psi.
Set pressure at 10-12 psi
Pattern surface
sticks to mold
upon release
Pinholes
Porosity
Improper release preparation.
Follow manufacturer s instructions
when applying release materials.
Primer not fully cured before
compounding and polishing.
Excess gel time for tooling gel coat.
Substrate porosity.
Fill porous areas with product using
squeegee, brush or roller before spraying.
Follow instructions in the application
guide for pattern surfacing.
Follow manufacturer s recs for gel time.
Acetone used as thinner.
Spray pressure too high
Spray orifce too small.
Reduce pressure to 34-40 psi.
Use larger orifce.
Use slower solvent such as MEK or
Duratec Reducer.
