The molecules of silicone flexible rubber joints are an elemental organic elastomer obtained by the hydrolysis and polycondensation of various dichlorosilanes. The classification of silicone flexible rubber joints can generally be classified according to vulcanization method and chemical structure.

The main performance characteristics of silicon flexible rubber joints are: excellent high and low temperature performance (usually working temperature range of -100 ~ 350 °); excellent electrical insulation properties are also the main performance of silicon flexible rubber joints, in addition The electrical insulation properties of silicon-flexible rubber joint vulcanizates change little when damp, change in frequency or temperature, and the silicon dichloride produced after combustion is still an insulator; it also has low moisture absorption and is immersed in water for a long time. Its water absorption rate is only about 1%, its physical and mechanical properties do not decrease, and its anti-mildew properties are good. In addition, many of its materials are not sticky and can act as isolation. Silicon flexible rubber joints are odorless and non-toxic, have no adverse effects on the human body, have slight reactions with body tissues, have excellent physiological inertia and physiological aging, and silicon flexible rubber joints are also superior to their polymer materials. The gas permeability also has the property of selecting permeability to gas, that is, the permeability of different gases (such as oxygen, nitrogen, carbon dioxide, etc.) is greatly different.