TC-805 A/B Page 1 of 2 Date: 03/20/2023
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-805 A/B
75 SHORE D POLYURETHANE CASTING SYSTEM
TC-805 A/B is a 75 Shore D material that provides excellent physical properties. TC-805 A/B was designed for a wide
variety of part making applications. For a faster work time/demold time, consider TC-803.
RoHS/REACH Compliant 15-20 minute work time
3-4 hour demold time Excellent for vacuum or pressure casting
Odorless, clean white Low viscosity
PHYSICAL PROPERTIES TEST METHOD TEST RESULTS
Hardness, Shore D ASTM D2240-04e1 75 2
Density (g/cc) ASTM D792-00 1.12
Cubic Inches per Pound N/A 25.6
Color/Appearance Visual White/Opaque
Tensile Strength (psi) ASTM D638-03 6,800
Tensile Modulus (psi) ASTM D638-03 2.1 x 10
5
Elongation (%) ASTM D638-03 10
Flexural Strength (psi) ASTM D790-03 9,800
Flexural Modulus (psi) ASTM D790-03 2.42 x 10
5
Shrinkage (in/in) linear 12 x x 0.006
Izod Impact, notched (ft-lb/in) ASTM D256-05 0.66
Heat Deflection Temperature @ 66 psi ASTM D648-04 203 F (95 C)
Heat Deflection Temperature @ 264 psi ASTM D648-04 193 F (89.4 C)
Note: Reported physical properties based on elevated temperature cured test specimens.
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 50
Mix Ratio by volume 100 52
Specific Gravity @ 77 F (25 C) 1.10 1.06
Color Pale Yellow Colorless
Viscosity (cps) @ 77 F (25 C) Brookfield 75 1,350
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 160
Work Time, 100g mass @ 77 F (25 C) 15 20 minutes
Demold Time @ 77 F (25 C) 3 4 hours
Properties above are typical and not for specifications.
TC-805 A/B Page 2 of 2 Date: 03/20/2023
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.”
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.
VACUUM DE-GASSING/DE-AIRING:
It is advisable whenever possible to evacuate entrapped air prior to casting this system. The use of de-airing agent, (BJB s
AF-4), can speed the process.
NOTE:
TC-805 A/B should be stored at ambient temperature and the TC-805 B component may require vacuum de-airing prior
to combining it with the A component. Evacuation of the mixed components is mandatory in order to achieve best
results. It is recommended that the A & B components as well as the mold should be pre-conditioned to a minimum of
80 F (26.7 C) prior to use. If further information is required, please contact BJB s technical staff for assistance.
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. 1 lb. 77
Gallon Kits 8 lbs. 4 lbs. 307
5-Gallon Kits 40 lbs. 20 lbs. 1,536
55-Gallon Drum Kits 440 lbs. 220 lbs. 16896
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, 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