TC-5024 A/B Page 1 of 2 Date: 07/18/2022
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TC-5024 A/B
25 SHORE A SILICONE ELASTOMER
TC-5024 A/B is a two-component, room temperature curing silicone elastomer. This system is designed primarily for making
molds, but is also used for gaskets as well as a wide variety of parts. This product is a condensation cured system using a tin
catalyst that provides a 30-minute work time with a 4-6 hour demold time.
Excellent physical properties with high tear
resistance
Fast demolds
Provides excellent detail reproduction Cures against various clays including Roma
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D2240-04e1 25 5
Density (g/cc) ASTM D792-00 1.21
Cubic Inches per Pound N/A 23.2
Color/Appearance Visual Blue/Opaque
Tensile Strength (psi) ASTM D412-98a(2002)e1 590
Tensile Modulus (psi) @ 100% ASTM D412-98a(2002)e1 44
Tensile Modulus (psi) @ 200% ASTM D412-98a(2002)e1 144
Tensile Modulus (psi) @ 300% ASTM D412-98a(2002)e1 280
Elongation (%) ASTM D412-98a(2002)e1 350
Tear Strength (pli) ASTM D624-00e1 Die B 110
Shrinkage (in/in) linear ASTM D2566 @ 1 depth 0.0025
Note: Reported physical properties are based on a 7 day room temperature cure.
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 12
Specific Gravity @ 77 F (25 C) 1.22 1.00
Color Off White Blue
Viscosity (cps) @ 77 F (25 C) Brookfield 61,000 60
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 31,000
Work Time, 100g mass @ 77 F (25 C) 30 40 minutes
Gel Time 50 60 minutes
Demold Time @ 77 F (25 C) 4 6 hours
SILICONE CASTING RUBBERS
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TC-5024 A/B Page 2 of 2 Date: 07/18/2022
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.”
MIXING:
TC-5024 A/B is processed by adding curing agent “B” at a ratio of 10 parts by weight to 100 parts by weight of “A”. TC-5024
“B” side is tinted blue so that when mixing the “A” and “B” sides together, the colorant in the “B” side will provide a visible
means of insuring that a uniform mix is acquired. Mix for 2 to 3 minutes in a clean container, then transfer material to another
clean container and mix for another 2 to 3 minutes.
INHIBITION:
New molds made with tin catalyzed silicones often have a tendency to inhibit the cure of softer elastomeric and aliphatic
urethanes (Water Clear Series) that are cast against the silicone. Post curing a new mold at 150 F for 24 hours may reduce the
cure inhibition problem in most cases. It is also recommended that the mold surface be washed thoroughly with soap and warm
water then dried before use.
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. 51
Gallon Kits 8 lbs. 13 oz. 205
5-Gallon Kits 40 lbs. 4 lbs. 1,021
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. Solvent 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 Methanol (by product), which is known to the State of
California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Silicone Handling Guide