Silpak R-3700-20 Liquid Silicone Rubber is a two-component, room temperature curing mold rubber. R-3700-20 silicone rubber is platinum activated, which, unlike tin-activated systems, do not shrink on cure or deteriorate over time. Molds made from R-3700-20 offer good chemical resistance, making them an appropriate choice when planning to cast polyesters, polyurethanes (plastic, foam, rubber), epoxies and more.
