Two-component addition molding room temperature vulcanized silicone rubber has elastic silicone gel and silicone rubber. The former has lower strength and the latter has higher strength. Their vulcanization mechanism is based on the addition reaction (hydrosilication reaction) of the vinyl group (or propylene group) on the silicone rubber end group and the hydrosilyl group on the crosslinker molecule. In this reaction, no by-products are evolved. Since no low-molecular matter is released during the cross-linking process, the addition molding room temperature vulcanized silicone rubber does not shrink during the vulcanization process. This type of vulcanizate is non-toxic, high mechanical strength, excellent resistance to hydrolysis (even under high pressure steam), good low compression deformation, low flammability, deep vulcanization, and vulcanization speed can be controlled by temperature Advantages, so it is a class of silicone rubber developed vigorously at home and abroad.