There are several properties of silicone, such as high temperature resistance, low temperature resistance, and insulation. Because of its low surface tension, it’s not adhesive easily to other material. But, the biggest drawback is that the strength of machine and bad performance of oil resistant. Silicon and PU are special single-purpose products and are not able to adhering with other rubber. According to the processing, they are divided into solid silicon and liquid silicon. And solid silicon is more commonly found in the market.