by | Sep 27, 2025
TC-821 A/B Page 1 of 2 Date: 09/20/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-821 A/B
84 SHORE D POLYURETHANE CASTING SYSTEM
TC-821 A/B produces a high impact rigid 84 Shore D material that is commonly used to make computer housings, models of all
kinds, artwork, and can also be used for electronic component encapsulation.
Convenient 1:1 by volume ratio High impact rigid material
High impact rigid material Fast demolds
Excellent for vacuum, pressure, hand, and rotational
casting
Exhibits high heat distortion temperature
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240-04e1 84 2
Density (g/cc) ASTM D792-00 1.18
Cubic Inches per Pound N/A 24.7
Color/Appearance Visual Translucent/Colorless
Tensile Strength (psi) ASTM D638-03 7,600
Tensile Modulus (psi) ASTM D638-03 2.4 x 10
5
Elongation (%) ASTM D638-03 11.5
Flexural Strength (psi) ASTM D790-03 11,500
Flexural Modulus (psi) ASTM D790-03 3 x 10
5
Shrinkage (in/in) linear 12 x x 0.005
Izod Impact, notched (ft-lb/in) ASTM D256-05 0.75
Heat Deflection Temperature @ 66psi ASTM D648-04 195 F (90.6 C)
Heat Deflection Temperature @ 264psi ASTM D648-04 170 F (76.7 C)
Dielectric Constant, 1MHz ASTM D150-87 3.06
Dissipation Factor, 1 MHz ASTM D150-87 0.019
Note: Reported physical properties based on elevated temperature cured test specimens.
HANDLING PROPERTIES Part A Part B
Mix Ratio (by weight ) 100 90
Mix Ratio (by volume) 100 100
Specific Gravity @ 77 F (25 C) 1.19 1.06
Color Yellow Colorless
Viscosity (cps) @ 77 F (25 C) Brookfield 60 2,300
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 1,200
Work Time, 100g mass @ 77 F (25 C) 2 minutes
Demold Time @ 77 F (25 C) 30 60 minutes
Properties above are typical and not for specifications.
TC-821 A/B Page 2 of 2 Date: 09/20/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial compliance
is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as to merchantability, fitness
for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed Manufacturer’s sale price of the particular
quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CURING :
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the
physical properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 180 F (82 C). Do
not exceed curing temperatures of 200 F (93 C). Support of the part may be required to prevent part deformation during the heat
curing process.
NOTE:
Re-blend the B component thoroughly prior to use. It is advisable to evacuate entrapped air prior to casting this system. The
use of a de-airing agent, (BJB s AF-4), can speed up the process. If further information is required, please contact BJB s
technical staff for assistance.
ACCESSORIES:
BJB offers silicone RTV mold making materials along with a wide range of accessory items. These include de-airing agents,
pigments, mold releases, and Jiffy
Mixers. Visit BJB s website at www.bjbenterprises.com or consult a BJB representative for
more information.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of shipment
when properly stored at recommended temperatures.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 1.8 lbs. 94
Gallon Kits 8 lbs. 7.2 lbs. 375
5-Gallon Kits 40 lbs. 36 lbs. 1,877
55-Gallon Drum Kits 400 lbs. 360 lbs. 18,772
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses or
goggles when handling this product.
IF CONTACT OCCURS :
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified medical
attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only as
directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including 1,2-Benzenedicarboxylic acid, di-C9-11-branched alkyl
esters, C10-rich and Naphthalene, which are known to the State of California to cause cancer and birth defects or other
reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Handling Guide
by | Sep 27, 2025
TC-821 A/B Page 1 of 2 Date: 09/20/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-821 A/B
84 SHORE D POLYURETHANE CASTING SYSTEM
TC-821 A/B produces a high impact rigid 84 Shore D material that is commonly used to make computer housings, models of all
kinds, artwork, and can also be used for electronic component encapsulation.
Convenient 1:1 by volume ratio High impact rigid material
High impact rigid material Fast demolds
Excellent for vacuum, pressure, hand, and rotational
casting
Exhibits high heat distortion temperature
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240-04e1 84 2
Density (g/cc) ASTM D792-00 1.18
Cubic Inches per Pound N/A 24.7
Color/Appearance Visual Translucent/Colorless
Tensile Strength (psi) ASTM D638-03 7,600
Tensile Modulus (psi) ASTM D638-03 2.4 x 10
5
Elongation (%) ASTM D638-03 11.5
Flexural Strength (psi) ASTM D790-03 11,500
Flexural Modulus (psi) ASTM D790-03 3 x 10
5
Shrinkage (in/in) linear 12 x x 0.005
Izod Impact, notched (ft-lb/in) ASTM D256-05 0.75
Heat Deflection Temperature @ 66psi ASTM D648-04 195 F (90.6 C)
Heat Deflection Temperature @ 264psi ASTM D648-04 170 F (76.7 C)
Dielectric Constant, 1MHz ASTM D150-87 3.06
Dissipation Factor, 1 MHz ASTM D150-87 0.019
Note: Reported physical properties based on elevated temperature cured test specimens.
HANDLING PROPERTIES Part A Part B
Mix Ratio (by weight ) 100 90
Mix Ratio (by volume) 100 100
Specific Gravity @ 77 F (25 C) 1.19 1.06
Color Yellow Colorless
Viscosity (cps) @ 77 F (25 C) Brookfield 60 2,300
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 1,200
Work Time, 100g mass @ 77 F (25 C) 2 minutes
Demold Time @ 77 F (25 C) 30 60 minutes
Properties above are typical and not for specifications.
TC-821 A/B Page 2 of 2 Date: 09/20/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial compliance
is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as to merchantability, fitness
for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed Manufacturer’s sale price of the particular
quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CURING :
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the
physical properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 180 F (82 C). Do
not exceed curing temperatures of 200 F (93 C). Support of the part may be required to prevent part deformation during the heat
curing process.
NOTE:
Re-blend the B component thoroughly prior to use. It is advisable to evacuate entrapped air prior to casting this system. The
use of a de-airing agent, (BJB s AF-4), can speed up the process. If further information is required, please contact BJB s
technical staff for assistance.
ACCESSORIES:
BJB offers silicone RTV mold making materials along with a wide range of accessory items. These include de-airing agents,
pigments, mold releases, and Jiffy
Mixers. Visit BJB s website at www.bjbenterprises.com or consult a BJB representative for
more information.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of shipment
when properly stored at recommended temperatures.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 1.8 lbs. 94
Gallon Kits 8 lbs. 7.2 lbs. 375
5-Gallon Kits 40 lbs. 36 lbs. 1,877
55-Gallon Drum Kits 400 lbs. 360 lbs. 18,772
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses or
goggles when handling this product.
IF CONTACT OCCURS :
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified medical
attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only as
directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including 1,2-Benzenedicarboxylic acid, di-C9-11-branched alkyl
esters, C10-rich and Naphthalene, which are known to the State of California to cause cancer and birth defects or other
reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Handling Guide
by | Sep 27, 2025
by | Sep 27, 2025
TC-812 REV 1 A/B Page 1 of 2 Date: 02/22/2023
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID FILLED POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-812 REV 1 A/B
LIGHTCAST
TC-812 REV 1 A/B Lightcast is a lightweight, rigid, quick setting, low shrinkage, low viscosity filled cast urethane that weighs
30-40% less than most conventional unfilled urethane systems. Parts made from TC-812 REV 1 can float in the water and its fast-
curing properties allow parts to be demolded in 1 hour or less. TC-812 REV 1 is ideal for carving, sanding, drilling, machining,
and modifying parts due to its low-density filler content. This product is perfect for fast patterns, mold cores, vacuum forming
bucks, temporary molds, lightweight models, fishing lures, and much more.
RoHS/REACH Compliant Mercury and Phthalate Free Easy to Paint or Pigment
Low Density/Lightweight Fast Processing Economical
Low Shrinkage Easy to Machine/Sand/Carve Floats/Buoyant
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240 60 5
Density (g/cc) ASTM D792 0.70
Cubic Inches per Pound N/A 39.62
Color/Appearance Visual Opaque Cream
Tensile Strength (psi) ASTM D638 2,600
Flexural Modulus (psi) ASTM D790 2.1 x 10
5
Shrinkage (in/in) linear 12 x1/2 x1/2 0.003
Heat Deflection Temperature @ 66psi ASTM D648 140 F (60 C)
Note: Reported physical properties ae based on test specimens cured at room temperature (77 F) for 7 days.
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 90
Mix Ratio by volume 100 100
Color Amber White
Viscosity (cps) @ 77 F (25 C) Brookfield 350 340
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 375
Work Time, 0.5 lb. mass @ 77 F (25 C) 4 5 minutes
Gel Time 8 10 minutes
Demold Time @ 77 F (25 C) 1 Hour
Properties above are typical and not for specifications.
MIXING INTRUCTIONS:
Both sides of TC-812 REV 1 A/B must be pre-mixed before each use. We recommend using a Jiffy Mixer to resuspend the
fillers, then combine Parts A and B by weight. Mix thoroughly in a polyethylene pail scraping the sides and bottom, de-air the
mixture and pour within two minutes. For best results, be sure that TC-812 REV 1 A/B and molds are at room temperature.
TC-812 REV 1 A/B Page 2 of 2 Date: 02/22/2023
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
ACCESSORIES:
BJB offers silicone RTV mold making materials along with a wide range of accessory items. These include de-airing agents,
pigments, mold releases, and Jiffy
Mixers. Visit BJB s website at www.bjbenterprises.com or consult a BJB representative for
more information.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of shipment
when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Gallon Kits 6.2 lbs. 5.6 lbs.
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses or
goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only as
directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Handling Guide
by | Sep 27, 2025
TC-808 Jet Black A/B Page 1 of 2 Date: 05/28/2024
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-808 Jet Black A/B
78 SHORE D URETHANE
CASTING SYSTEM
TC-808 Jet Black A/B is a low viscosity, rapid setting, rigid urethane compound that is pre-pigmented black. This system will
cure quickly to a hard, tough casting. TC-808 A/B is generally insensitive to moisture during and after cure and will readily
bond to itself if stage pours are required. TC-808 A/B is recommended in applications where a “thermoplastic feel” is desired.
Prototyping Molding Non-mercury
Special Effects Slush/Roto Casting Tough, Heat Resistant
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240 78 2
Density (g/cc) ASTM D792 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual Black
Tensile Strength (psi) ASTM D638 6,000
Tensile Modulus (psi) ASTM D638 190,000
Elongation (%) ASTM D638 7
Flexural Strength (psi) ASTM D790 6,225
Flexural Modulus (psi) ASTM D790 170,000
Shrinkage (in/in) linear 12 x1/2 x1/2 0.004
Izod Impact, notched (ft-lb/in) ASTM D256 0.52
Heat Deflection Temperature, 66 psi ASTM D648-04 170 F (76.7 C)
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 100
Mix Ratio by volume 90 100
Specific Gravity @ 77 F (25 C) 1.14 1.02
Color Pale Yellow Black
Viscosity (cps) @ 77 F (25 C) Brookfield 90 300
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 200
Work Time, 100g mass @ 77 F (25 C) 2 2.25 minutes
Demold Time @ 77 F (25 C) 10 20 minutes (see Note 1)
Properties above are typical and not for specifications.
TC-808 Jet Black A/B Page 2 of 2 Date: 05/28/2024
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as to
merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CURING:
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the
physical properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 180 F (82 C).
Do not exceed curing temperatures of 200 F (93 C). Support of the part may be required to prevent part deformation during
the heat curing process.
NOTE 1:
TC-808 A/B generally cures to a demoldable state in about 10-20 minutes; however, thin sections or certain part
configurations may require more in-mold cure time. TC-808 A/B gains increasing toughness early in the cure cycle and thick
sections, (3/8″ or greater), may be demolded much sooner. Sections that are less than a 1/8″ may require an hour or more
before demold.
NOTE 2:
The “B” side should be remixed before each use until uniform in appearance. Opened containers of material should be purged
with dry nitrogen prior to replacing lids or caps to prevent moisture contamination from humid air.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 2 lbs. 103
Gallon Kits 8 lbs. 8 lbs. 411
5-Gallon Kits 40 lbs. 40 lbs. 2,056
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety
glasses or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek
qualified medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
WARNING: This product can expose you to chemicals including Carbon black and 1,2-Benzenedicarboxylic acid, di-
C9-11-branched alkyl esters, C10-rich, which are known to the State of California to cause cancer and birth defects or
other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
NOTE:
Refer to the Safety Data Sheet before using this product. For processing tips and guides, please visit:
learn.bjbmaterials.com to discover additional information.
by | Sep 27, 2025
by | Sep 27, 2025
TC-808 A/B Page 1 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-808 A/B
78 SHORE D URETHANE
CASTING SYSTEM
TC-808 A/B is a low viscosity, rapid setting, and rigid urethane compound. This system will cure quickly to a hard, tough
casting. TC-808 A/B is generally insensitive to moisture during and after cure and will readily bond to itself if stage pours are
required. TC-808 A/B is recommended in applications where a “thermoplastic feel” is desired.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240 78 2
Density (g/cc) ASTM D792 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual White/Opaque
Tensile Strength (psi) ASTM D638 6,000
Tensile Modulus (psi) ASTM D638 190,000
Elongation (%) ASTM D638 7
Flexural Strength (psi) ASTM D790 6,225
Flexural Modulus (psi) ASTM D790 170,000
Shrinkage (in/in) linear 12 x1/2 x1/2 0.004
Izod Impact, notched (ft-lb/in) ASTM D256 0.52
Heat Deflection Temperature, 66 psi ASTM D648-04 170 F (76.7 C)
Dielectric Constant, 1 MHz ASTM D150 3.447
Dissipation Factor, 1 MHz ASTM D150 0.0176
Ball Pressure Test (mm) 167 F (75 C) IEC 60695-10-2 1.7
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 100
Mix Ratio by volume 90 100
Specific Gravity @ 77 F (25 C) 1.14 1.02
Color Pale Yellow White
Viscosity (cps) @ 77 F (25 C) Brookfield 90 300
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 200
Work Time, 100g mass @ 77 F (25 C) 2 2.25 minutes
Demold Time @ 77 F (25 C) 10 20 minutes (see Note 1)
Properties above are typical and not for specifications.
TC-808 A/B Page 2 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as to
merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed Manufacturer’s
sale price of the particular quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CU RING:
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the
physical properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 180 F (82 C). Do
not exceed curing temperatures of 200 F (93 C). Support of the part may be required to prevent part deformation during the
heat curing process.
NOTE 1:
TC-808 A/B generally cures to a demoldable state in about 10-20 minutes; however, thin sections or certain part configurations
may require more in-mold cure time. TC-808 A/B gains increasing toughness early in the cure cycle and thick sections, (3/8″
or greater), may be demolded much sooner. Sections that are less than a 1/8″ may require an hour or more before demold.
NOTE 2:
The “B” side should be remixed before each use until uniform in appearance. Opened containers of material should be purged
with dry nitrogen prior to replacing lids or caps to prevent moisture contamination from humid air.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 2 lbs. 103
Gallon Kits 8 lbs. 8 lbs. 411.2
5-Gallon Kits 40 lbs. 40 lbs. 2,056
55-Gallon Drum Kits 400 lbs. 400 lbs. 20,560
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified medical
attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including Mercury compounds, which are known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information, go to
www.P65Warnings.ca.gov.
Handling Guide
by | Sep 27, 2025
TC-808 A/B Page 1 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-808 A/B
78 SHORE D URETHANE
CASTING SYSTEM
TC-808 A/B is a low viscosity, rapid setting, and rigid urethane compound. This system will cure quickly to a hard, tough
casting. TC-808 A/B is generally insensitive to moisture during and after cure and will readily bond to itself if stage pours are
required. TC-808 A/B is recommended in applications where a “thermoplastic feel” is desired.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240 78 2
Density (g/cc) ASTM D792 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual White/Opaque
Tensile Strength (psi) ASTM D638 6,000
Tensile Modulus (psi) ASTM D638 190,000
Elongation (%) ASTM D638 7
Flexural Strength (psi) ASTM D790 6,225
Flexural Modulus (psi) ASTM D790 170,000
Shrinkage (in/in) linear 12 x1/2 x1/2 0.004
Izod Impact, notched (ft-lb/in) ASTM D256 0.52
Heat Deflection Temperature, 66 psi ASTM D648-04 170 F (76.7 C)
Dielectric Constant, 1 MHz ASTM D150 3.447
Dissipation Factor, 1 MHz ASTM D150 0.0176
Ball Pressure Test (mm) 167 F (75 C) IEC 60695-10-2 1.7
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 100
Mix Ratio by volume 90 100
Specific Gravity @ 77 F (25 C) 1.14 1.02
Color Pale Yellow White
Viscosity (cps) @ 77 F (25 C) Brookfield 90 300
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 200
Work Time, 100g mass @ 77 F (25 C) 2 2.25 minutes
Demold Time @ 77 F (25 C) 10 20 minutes (see Note 1)
Properties above are typical and not for specifications.
TC-808 A/B Page 2 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as to
merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed Manufacturer’s
sale price of the particular quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CU RING:
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the
physical properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 180 F (82 C). Do
not exceed curing temperatures of 200 F (93 C). Support of the part may be required to prevent part deformation during the
heat curing process.
NOTE 1:
TC-808 A/B generally cures to a demoldable state in about 10-20 minutes; however, thin sections or certain part configurations
may require more in-mold cure time. TC-808 A/B gains increasing toughness early in the cure cycle and thick sections, (3/8″
or greater), may be demolded much sooner. Sections that are less than a 1/8″ may require an hour or more before demold.
NOTE 2:
The “B” side should be remixed before each use until uniform in appearance. Opened containers of material should be purged
with dry nitrogen prior to replacing lids or caps to prevent moisture contamination from humid air.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 2 lbs. 103
Gallon Kits 8 lbs. 8 lbs. 411.2
5-Gallon Kits 40 lbs. 40 lbs. 2,056
55-Gallon Drum Kits 400 lbs. 400 lbs. 20,560
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified medical
attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including Mercury compounds, which are known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information, go to
www.P65Warnings.ca.gov.
Handling Guide
by | Sep 27, 2025
TC-808 A/B Page 1 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-808 A/B
78 SHORE D URETHANE
CASTING SYSTEM
TC-808 A/B is a low viscosity, rapid setting, and rigid urethane compound. This system will cure quickly to a hard, tough
casting. TC-808 A/B is generally insensitive to moisture during and after cure and will readily bond to itself if stage pours are
required. TC-808 A/B is recommended in applications where a “thermoplastic feel” is desired.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240 78 2
Density (g/cc) ASTM D792 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual White/Opaque
Tensile Strength (psi) ASTM D638 6,000
Tensile Modulus (psi) ASTM D638 190,000
Elongation (%) ASTM D638 7
Flexural Strength (psi) ASTM D790 6,225
Flexural Modulus (psi) ASTM D790 170,000
Shrinkage (in/in) linear 12 x1/2 x1/2 0.004
Izod Impact, notched (ft-lb/in) ASTM D256 0.52
Heat Deflection Temperature, 66 psi ASTM D648-04 170 F (76.7 C)
Dielectric Constant, 1 MHz ASTM D150 3.447
Dissipation Factor, 1 MHz ASTM D150 0.0176
Ball Pressure Test (mm) 167 F (75 C) IEC 60695-10-2 1.7
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 100
Mix Ratio by volume 90 100
Specific Gravity @ 77 F (25 C) 1.14 1.02
Color Pale Yellow White
Viscosity (cps) @ 77 F (25 C) Brookfield 90 300
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 200
Work Time, 100g mass @ 77 F (25 C) 2 2.25 minutes
Demold Time @ 77 F (25 C) 10 20 minutes (see Note 1)
Properties above are typical and not for specifications.
TC-808 A/B Page 2 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as to
merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed Manufacturer’s
sale price of the particular quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CU RING:
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the
physical properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 180 F (82 C). Do
not exceed curing temperatures of 200 F (93 C). Support of the part may be required to prevent part deformation during the
heat curing process.
NOTE 1:
TC-808 A/B generally cures to a demoldable state in about 10-20 minutes; however, thin sections or certain part configurations
may require more in-mold cure time. TC-808 A/B gains increasing toughness early in the cure cycle and thick sections, (3/8″
or greater), may be demolded much sooner. Sections that are less than a 1/8″ may require an hour or more before demold.
NOTE 2:
The “B” side should be remixed before each use until uniform in appearance. Opened containers of material should be purged
with dry nitrogen prior to replacing lids or caps to prevent moisture contamination from humid air.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 2 lbs. 103
Gallon Kits 8 lbs. 8 lbs. 411.2
5-Gallon Kits 40 lbs. 40 lbs. 2,056
55-Gallon Drum Kits 400 lbs. 400 lbs. 20,560
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified medical
attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including Mercury compounds, which are known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information, go to
www.P65Warnings.ca.gov.
Handling Guide
by | Sep 27, 2025
TC-808 A/B Page 1 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
RIGID POLYURETHANES
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-808 A/B
78 SHORE D URETHANE
CASTING SYSTEM
TC-808 A/B is a low viscosity, rapid setting, and rigid urethane compound. This system will cure quickly to a hard, tough
casting. TC-808 A/B is generally insensitive to moisture during and after cure and will readily bond to itself if stage pours are
required. TC-808 A/B is recommended in applications where a “thermoplastic feel” is desired.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240 78 2
Density (g/cc) ASTM D792 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual White/Opaque
Tensile Strength (psi) ASTM D638 6,000
Tensile Modulus (psi) ASTM D638 190,000
Elongation (%) ASTM D638 7
Flexural Strength (psi) ASTM D790 6,225
Flexural Modulus (psi) ASTM D790 170,000
Shrinkage (in/in) linear 12 x1/2 x1/2 0.004
Izod Impact, notched (ft-lb/in) ASTM D256 0.52
Heat Deflection Temperature, 66 psi ASTM D648-04 170 F (76.7 C)
Dielectric Constant, 1 MHz ASTM D150 3.447
Dissipation Factor, 1 MHz ASTM D150 0.0176
Ball Pressure Test (mm) 167 F (75 C) IEC 60695-10-2 1.7
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 100
Mix Ratio by volume 90 100
Specific Gravity @ 77 F (25 C) 1.14 1.02
Color Pale Yellow White
Viscosity (cps) @ 77 F (25 C) Brookfield 90 300
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 200
Work Time, 100g mass @ 77 F (25 C) 2 2.25 minutes
Demold Time @ 77 F (25 C) 10 20 minutes (see Note 1)
Properties above are typical and not for specifications.
TC-808 A/B Page 2 of 2 Date: 11/05/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as to
merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed Manufacturer’s
sale price of the particular quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CU RING:
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the
physical properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 180 F (82 C). Do
not exceed curing temperatures of 200 F (93 C). Support of the part may be required to prevent part deformation during the
heat curing process.
NOTE 1:
TC-808 A/B generally cures to a demoldable state in about 10-20 minutes; however, thin sections or certain part configurations
may require more in-mold cure time. TC-808 A/B gains increasing toughness early in the cure cycle and thick sections, (3/8″
or greater), may be demolded much sooner. Sections that are less than a 1/8″ may require an hour or more before demold.
NOTE 2:
The “B” side should be remixed before each use until uniform in appearance. Opened containers of material should be purged
with dry nitrogen prior to replacing lids or caps to prevent moisture contamination from humid air.
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 2 lbs. 103
Gallon Kits 8 lbs. 8 lbs. 411.2
5-Gallon Kits 40 lbs. 40 lbs. 2,056
55-Gallon Drum Kits 400 lbs. 400 lbs. 20,560
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified medical
attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including Mercury compounds, which are known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information, go to
www.P65Warnings.ca.gov.
Handling Guide
