TC-854 A/B Page 1 of 2 Date: 07/03/2023
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-854 A/B
RIGID 84 SHORE D POLYURETHANE CASTING SYSTEM
TC-854 is an extremely stiff, high impact, translucent material making it ideal when exact color matching is required. When
coupled with the low viscosity, low shrink and high heat deflection temperature, this material is always a popular choice for a
wide variety of applications.
RoHS/REACH compliant Odorless, Translucent
High impact strength Low viscosity
High heat distortion temperature Excellent for hand, vacuum, or pressure casting
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore D ASTM D2240-04e1 84 2
Density (g/cc) ASTM D792-00 1.20
Cubic Inches per Pound N/A 24.5
Color/Appearance Visual Transparent Pale Yellow
Tensile Strength (psi) ASTM D638-03 10,060
Tensile Modulus (psi) ASTM D638-03 3.3 x 10
5
Elongation (%) ASTM D638-03 10.5
Flexural Strength (psi) ASTM D790-03 13,700
Flexural Modulus (psi) ASTM D790-03 3.6 x 10
5
Shrinkage (in/in) linear 12 x1/2 x1/2 0.001
Izod Impact, notched (ft-lb/in) ASTM D256-05 1.14
Heat Deflection Temperature @ 66 psi ASTM D648-04 190 5 F (88 3 C)
Heat Deflection Temperature @ 264 psi ASTM D648-04 170 5 F (77 3 C)
*Note: Reported physical properties are based on test specimens cured 1-3 hours at room temperature then 16 hours at 180 F (82 C).
Shrink test specimens are cured for 24 hours at room temperature and then 16 hours at 180 F (82 C).
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 60
Mix Ratio by volume 100 66
Specific Gravity @ 77 F (25 C) 1.17 1.07
Color Pale Yellow Colorless
Viscosity (cps) @ 77 F (25 C) Brookfield 165 725
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 450
Work Time, 100g mass @ 77 F (25 C) 6 8 minutes
Gel Time 7 9 minutes
Demold Time @ 77 F (25 C) 2 3 hours
Properties above are typical and not for specifications.
TC-854 A/B Page 2 of 2 Date: 07/03/2023
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.
MIXING NOTE:
Preconditioning the A and B components to approximately 80 -100 F (27 -38 C) prior to mixing is desirable for best results.
Evacuation of the mixed components is recommended in order to achieve the best results. The use of a de-airing agent, (BJB s AF-
4), can speed the process.
HANDLING NOTE:
Material contains a small amount of moisture scavenger that will settle to the bottom of the container. At moderate levels, the scavenger
has little effect on the cured properties. BJB suggests doing one of the following:
A. Mix material prior to every use to uniformly redistribute the scavenger OR-
B. Allow moisture scavenger to settle at the bottom of container without remixing. (A layer of residual moisture scavenger should
remain in the container when finished.)
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. 1.2 lbs. 78
Gallon Kits 8 lbs. 4.8 lbs. 314
5-Gallon Kits 40 lbs. 24 lbs. 1,568
55-Gallon Drum Kits 400 lbs. 240 lbs. 15,680
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 Ethylbenzene, 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