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.