Dimethyl silicone rubber is the earliest type of silicone rubber put into commercial production. It can maintain good elasticity in the range of -60～200℃, good aging resistance, excellent electrical insulation, moisture resistance, shock resistance and physiological inertia. characteristic. Dimethyl silicone rubber is mainly used for coating of strong materials, and can also be made into various extruded and calendered products for electromechanical, aviation, automotive and medical industries. However, due to the low vulcanization activity of dimethyl silicone rubber, it is difficult to vulcanize when used in the manufacture of thick products, the inner layer is easy to foam and the high temperature compression permanent deformation is large, so it has been replaced by methyl vinyl silicone rubber.