In addition, silicone rubber has the outstanding properties of being physiologically inert and not causing coagulation, so it is widely used in the medical field. Silicone rubber is divided into thermal vulcanization type (high temperature vulcanization silicone HTV) and room temperature vulcanization type (RTV). The room temperature vulcanization type is divided into polycondensation reaction type and addition reaction type. High-temperature silicone rubber is mainly used to manufacture various silicone rubber products, while room-temperature silicone rubber is mainly used as an adhesive, potting material or mold. The thermal vulcanization type has the largest dosage, and the thermal vulcanization type is divided into methyl silicone rubber (MQ), methyl vinyl silicone rubber (VMQ, with the largest dosage and product brand), methyl vinyl phenyl silicone rubber PVMQ (low temperature resistance, radiation resistance ), others include silicone rubber, fluorosilicone rubber, etc.