The electronic and electrical industry is an area where silica gel is the earliest used insulating material and has a large demand. Silica gel is mainly used for TV anode cover, high voltage protection cover, high voltage outgoing line, refrigerator defroster wire, power or signal transmission wire and cable, etc. The insulator made of silica gel will replace ceramic products and be widely used in transmission lines, especially ultra-high voltage lines. Conductive silica gel is used for electric contact parts of electronic computers, telephones and other instruments, as well as contact parts of liquid crystal display. The wires and cables made of flame retardant and radiation resistant silica gel are widely used in atomic power stations. Silica gel heating sheet and heating belt are used to control the working temperature of various precision instruments and oil pipelines, and they are used as heating blankets for physical therapy heat applicators in medical treatment. Room temperature curing silica gel can be used as water-proof, moisture-proof and shockproof filling materials.            Silica gel has been widely used in the pump sealing of dishwasher and washing machine because of its heat-resistant property. Silica gel is very suitable for use as a gasket in coffee pots, electric fryers and steam irons. The earpiece and head pad of stereo earphone are made of silica gel, which can eliminate external noise and is soft and comfortable.