The chemical composition of silicon rubber is silicon oxygen, silicon rubber refers to the main chain is replaced by silicon and oxygen atoms, silicon atoms are usually connected with two organic groups of rubber, ordinary silicon rubber is mainly composed of methyl and a few vinyl silicone chain, the introduction of phenyl can improve the high and low temperature resistance of silicon rubber function, The introduction of trifluoropropyl and cyanogen can improve the temperature and oil resistance of silicone rubber.

Silicone rubber has excellent low temperature resistance and can still work at -55℃. With the introduction of phenyl, the temperature reached -73℃. The heat-resisting function of silicon rubber is also very prominent. It can be operated for a long time at 180℃, and can withstand a little higher than 200℃ for several weeks or longer. It is still elastic, and can withstand a high temperature of more than 300℃ instantly.

Silica gel is a kind of silicone rubber, attributed to one-component room temperature vulcanized liquid rubber, once exposed in the air, the silane monomer condensation, network structure, system crosslinking, cannot melt and dissolve, elastic, rubber state, together with the bonding object. Its thermal conductivity was a little higher than ordinary rubber, once cured, it is hard to glue the object space, as if by some chemical books and "silica gel" should be condensation of silica content, to amorphous material, water insolubles and any solvent, non-toxic tasteless, chemical stability, in addition to the strong alkali, hydrofluoric acid does not react with any material.