TC-5050 A/B Page 1 of 2 Date: 08/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5050 A/B
50 SHORE A
ROOM TEMPERATURE CURING SILICONE
TC-5050 A/B is a room temperature, addition/platinum curing silicone rubber designed for mold making, encapsulation
applications, pressure pads, gaskets, and various types of parts. It is also used to make molds for casting low melting metals into.
With the use of talc powder as an interface the TC-5050 A/B has been used in production with cast metal temperatures running
650 F (344 C) and has been subject to temperatures up to 850 F (454 C) for making a limited number of casts. With the ability
to withstand high temperatures the TC-5050 A/B works very well as a mask for metal spraying and welding operations.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D2240 50 5
Cubic Inches per Pound N/A 22.2
Color/Appearance Visual Blue
Tensile Strength (psi) ASTM D412 620
Elongation (%) ASTM D412 325
Tear Strength (pli) ASTM D624 Die B 87
Coefficient of Thermal Expansion, (in/in/ F) ASTM E831 16.5 x 10
-5
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 12
Specific Gravity @ 77 F (25 C) 1.23 0.99
Color Off White Blue
Viscosity (cps) @ 77 F (25 C) Brookfield 121,400 490
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 90,000
Work Time, 100g mass @ 77 F (25 C) 30 minutes
Gel Time 60 minutes
Demold Time @ 77 F (25 C) 24 hours
Heat Cure @ 150 F (66 C) 2 4 hours
SILICONE CASTING RUBBERS
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An ISO-9001 Certified company
TC-5050 A/B Page 2 of 2 Date: 08/18/2021
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.”
INHIBITION:
Certain materials will cause inhibition or neutralization of the curing agent. These materials are sulphur and organometallic salt
containing compounds such as organic rubbers and many condensation cured RTV silicone rubbers. Inhibition may easily be
determined by brushing a small quantity of TC-5050 over a localized area of the surface to be reproduced. If the TC-5050 is
gummy or uncured after the curing time, then you know the mold surface is acting as an inhibitor. Molds made from wood,
plaster, metal or plastic should not cause inhibition if they are clean. To insure against possible problems, it is advisable to seal
the surface with RF-5215 or other appropriate sealer. Contact BJB s Tech Sales for additional information.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 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. 3.2 oz. 49
Gallon Kits 8 lbs. 13 oz. 196
5-Gallon Kits 40 lbs. 4 lbs. 977
55-Gallon Drum Kits 450 lbs. 45 lbs. 10,989
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.
Silicone Handling Guide