STM - 40 is a high tear strength, high elongation addition cure mold making RTV silicone rubber. It has low shrinkage and reproduces the most intricate detail. It is a thixotropic, fast curing, material with outstanding release properties. STM - 40 contains no by-products, and is non-allergenic.
Weigh out the required amount and add the required amount of Catalyst. Mix thoroughly scraping both the bottom and sides of the mixing container. Evacuate the air and then pour into the Mold.
Cure Schedule: 10-15 minutes
Final hardness after 24 hrs
Coming soon - Call (800) 966-5142 for more info or email info@polycastindustries.com