Silicone Mold Rubbers: Polytek® manufactures a full range of two-part, room-temperature curing silicone rubbers that offer great flexibility, tear strength, chemical resistance, and release properties. Silicone molds can be used to cast a variety of materials, including polyurethane, polyester and epoxy resins, polyurethane foam, plaster, wax, concrete, low melting metals, and more. One of the primary advantages of using silicone mold rubbers instead of other flexible materials, like…