Rectangular Silicone Molds Cold Soap Silicone in Wood Box Molds Heat-resistant temperature of silicone, which is innovative designed, soft, styles varied, stripping and cleaning easy, ranges from -40 Degrees Celsius to +230 Degrees Celsius. Cedarwood Surfaces are polished and smooth. Natural fir wood, a little knots, full of original flavor. The product is not bulging, easy mold release and easy to clean.