Silicone Mold Rubbers

Silicone Mold RubbersPolytek® 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 polyurethane rubber, is that release agent is not needed when casting polyurethane resins, foams and other materials into silicone molds. This is especially important when cast parts need to be painted as paint will not adhere well to parts with residual release agent.

Polytek® manufactures two different types of silicone rubbers: platinum-cured (PlatSil®) silicones and tin-cured (TinSil®) silicones. Read about their differences below in the section titled A Comparison: PlatSil® vs. TinSil® Silicone Mold Rubbers

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