TC-895 A/B Page 1 of 2 Date: 11/04/2022
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-895 A/B
RIGID 84 SHORE D HIGH HEAT RESISTANT
POLYURETHANE CASTING SYSTEM
TC-895 A/B is a RoHS compliant, non-mercury based catalyst polyurethane system that produces a tough 84 shore D material.
This system has an extremely high heat deflection temperature and has been used for under the hood automotive applications. In
some cases, TC-895 can be post cured without having to use fixtures.
High heat resistance High impact
RoHS/REACH compliant Working time of 6-7 minutes
PHYSICAL PROPERTIES TEST METHOD
CURE
SCHEDULE 1*
CURE
SCHEDULE 2*
Hardness, Shore D ASTM D2240-04e1 84 2 84 2
Density (g/cc) ASTM D792-00 1.22 1.22
Cubic Inches per Pound N/A 24 24
Color/Appearance Visual
Translucent Pale
Yellow
Translucent Pale
Yellow
Tensile Strength (psi) ASTM D638-03 10,300 10,400
Tensile Modulus (psi) ASTM D638-03 2.93 x 10
5
2.87 x 10
5
Elongation (%) ASTM D638-03 9.1 9.8
Flexural Strength (psi) ASTM D790-03 12,700 12,200
Flexural Modulus (psi) ASTM D790-03 3.17 x 10
5
3.03 x 10
5
Shrinkage (in/in) linear 12 x x 0.008 0.005
Izod Impact, notched (ft-lb/in) ASTM D256-05 0.88 0.95
Heat Deflection Temperature @ 66 psi ASTM D648-04 340 F (171.1 C) 290 F (143.3 C)
Heat Deflection Temperature @ 264 psi ASTM D648-04 218 F (103.3 C) 213 F (100.6 C)
Coefficient of Thermal Expansion (in/in/ F) ASTM E831-06 73.1 x 10
-6
TBD
CURE SCHEDULE 1:
To achieve maximum physical properties, the material should be preconditioned to 77 F (25 C) and the mold approximately to
120 F (49 C). After casting the material, the mold should be placed into a 150 F (66 C) oven and left for 1 hour. After 1 hour
the part can be demolded and then post cured with heat for 16 hours at 180 F (82 C). Support of the part in some cases may be
required to prevent part deformation during the heat curing process.
CURE SCHEDULE 2:
Most of the physical properties can be achieved when casting this product at room temperature then followed with a post cure.
Precondition the material and molds to 77 F (25 C). After casting, leave the part at room temperature for 16 24 hours
followed with a post cure for an additional 16 hours at 180 F (82 C). Support of the part in some cases may be required to
prevent part deformation during the heat curing process.
Note: To obtain higher heat deflection temperatures and faster demold times, it is advised to use heat during the casting process.
TC-895 A/B Page 2 of 2 Date: 11/04/2022
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.”
HANDLING PROPERTIES Part A Part B
Mix Ratio (by weight or volume) 100 50
Specific Gravity 1.16 1.16
Color Pale Yellow Amber
Viscosity (cps) @ 77 F (25 C) Brookfield 1,000 650
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 850
Work Time, 100g mass @ 77 F (25 C) 6 7 minutes
Gel Time 7 8 minutes
Demold Time @ 77 F (25 C) 5 6 hours
Demold Time @ 150 F (66 C) 1 hour
Properties above are typical and not for specifications.
NOTE #1:
It is advisable whenever possible to evacuate entrapped air prior to casting this system. The use of a de-airing agent can speed up the
process. BJB s AF-4 antifoam works best as the de-airing agent. In conjunction with these support products BJB offers pigments in a
wide variety of colors and stainless steel mixers called Jiffy Mixers . For additional information on the use of this product, refer to
BJB Guidelines for Handling Polyurethane Products. If further information is required, please call BJB s technical staff for assistance.
NOTE #2:
When the cured material is exposed to direct sunlight or strong UV, the material will turn to an orange color within approximately 2
hours.
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. 72
Gallon Kits 8 lbs. 4 lbs. 288
5-Gallon Kits 40 lbs. 20 lbs. 1,440
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 Naphthalene, which is known to the State of California
to cause cancer. For more information, go to www.P65Warnings.ca.gov.
Handling Guide