PRODUCT PROPERTIES
All time calculations are based on temperatures of 77 F, 25
C
Lab tested with Norox 925 MEKP
Viscosity
As measured on a Brookfield
Viscometer Model RVF, Spindle #2 at
20 rpm
1900-2500 cps
Thixotropic Index 6.5
Gel Time
Sample based on a 100g mass
catalyzed at 2% with MEKP
22 minutes +/- 2 min
Weight per gallon 11.8 lbs
Coverage per Gallon
20 mil thickness
80 sq feet
KEY USES
Surfacing patterns for
composite molds
Tooling board
MDF
Brick and concrete
Plaster and clay
Polyester or vinyl ester
fiberglass
The Duratec EZ Sanding Primer is a favorite across the composites
industry, as it is versatile enough to be used in a multitude of
applications. This primer is an exceptionally easy-to-sand product that
can be sprayed to a high build to eliminate defects. Sand and polish for a
smooth, porosity-free surface.
FEATURES
RAPID BUILD
Up to 40 mils.
EASY APPLICATION
Easy to spray from HVLP guns.
Low porosity, fine smooth surface
COST SAVING
Uses less sandpaper and reduces
sanding labor by providing a
buildabl
e surface that sands
quickly.
ADHESION
To
most epoxies and substrates
other than metal.
HDT
Heat distortion temperature of
180 F (83 C)
DURATEC GREY EZ
SANDING PRIMER
PRODUCT #707-0 61
SAFETY & HANDLING
Duratec EZ Sanding Primer
is extremely flammable. Do not apply near sparks, open flames or
heat. Keep area ventilated. Do not smoke. Avoid continuous breathing of vapor. Durat
ec EZ
Sanding P rimer contains ingredients which could be harmfu
l if mishandled. Contact with skin
and eyes
should be avoided and necessary protective equipment and clothing should be worn.
Individuals should wash with
s oap and water before eating or drinking. All container s should be
properly labeled to prevent accidental ingestion or improper disposal. Individuals should reseal
any partl
y 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.
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.
DESCRIPTION
909-546-1160
hawkeyesales@hawkeyeind.com
PO BOX 415,
BLOOMINGTON, CA 92316
WWW.HAWEKEYIND.COM
COLOR OPTIONS
Black (702-061)
White (714-061)
Grey (707-061)
REVISED MAY 2023
DURATEC GREY EZ
SANDING PRIMER
APPLICATION GUIDE | PRODUCT #707-061
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 products leave the factory mixed for optimal performance. If thinning is required, we
suggest the use of Duratec 39UCE Reducer. Duratec Reducer duplicates the solvents that the Primer
contains and will quickly reduce viscosity. MEK Thinner is a reasonable alternative. Add as little
thinner as possible.
Prepare
T
emperature should be at least 64 F for both the product and the part.
Duratec 707-061 contains functional
llers that will sink to the bottom of the container. Use either a
paint shaker or a drill-mounted mixer. A paint stir stick will not be enough to mix up.
We recommend HVLP air-assisted spray guns. A 2.5 mm tip or larger is ideal for Duratec EZ Sanding
Primer. Use 34-40 psi air pressure (at the gun). Adjust the needle and fan to provide the proper spray.
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.
Apply
Apply 5-7 mils and immediately apply another 5-7 mils in the opposite direction for a crosshatch efect.
You should spray multiple passes of 5-7 mils, allowing a minimum of two minutes to out-gas between
coats. Up to 40 mils can be applied if the part requires aggressive post sanding.
Do not allow the EZ Sanding Primer to become tack-free between build coats. If the EZ Sanding Primer
becomes tack-free, allow it to cure completely, sand with 180-220 grit, and recoat.
WWW.HAWKEYEIND.COM 909-546-1160 HAWKEYESALES@HAWKEYEIND.COM PO BOX 415, BLOOMINGTON, CA 92316Liability 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 sub Mect 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.
www.hawkeyeind.com
DURATEC GREY EZ
SANDING PRIMER
TROUBLESHOOTING | PRODUCT #707-061
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.
Cracking Primer spray too thickly, too fast.
Increase the number of passes,
adding dwell time between coats.
Dimples (Craters)
Film build up too rapid, solvent
trapped in primer.
Increase the number of passes to achieve
desired thickness. Allow for ash o
between passes.
Orange Peel
Spray pressure incorrect.
Pot pressure incorrect.
Set pressure at 35-50 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 35-50 psi.
Use larger orifce.
Use slower solvent such as MEK or
Duratec Reducer
See the Liability and Warranty Statement on Page 1