Butyl rubber has good air tightness. It also has heat resistance, ozone resistance, aging resistance, chemical resistance, shock absorption and electrical insulation properties. It has good resistance to sunlight and ozone, and can be exposed to animal or vegetable oil or oxidizable chemicals. The inner tube of all kinds of tires, the airtight layer of tubeless tires, and various sealing gaskets are used as the lining, pipeline, and conveyor belt of corrosive liquid containers in the chemical industry, and as waterproof materials in agriculture.