Silica gel tube is a kind of special comprehensive performance widely good rubber, has excellent electrical insulation performance, aging resistance, chemical stability, oxidation resistance, radiation resistance, physiological inertia, good permeability, high and low temperature resistance, can be used in -60℃ ~ 250℃ for a long time. Can be widely used in aviation, electronics, petroleum, chemical, machinery, electrical appliances, medical, oven, food and other industrial sectors of good electrical insulation sealing, liquid transport materials.