Smooth-Sil 940 Platinum Silicone exhibits good chemical, abrasion and heat resistance. Materials such as plasters, concrete, wax, low melt metal alloys or resins (utethane, epoxy and polyester) can be cast into these silicone rubbers without a release agent. Smooth-Sil 940is food grade silicones suitable for making baking molds and trays, ice trays, casting butter, chocolate and other applications use to produce food.