Butyl rubber has good chemical stability and thermal stability, and the most outstanding are air tightness and water tightness. Its air permeability is only 1/7 of that of natural rubber and 1/5 of that of styrene-butadiene rubber, while its steam permeability is 1/200 of that of natural rubber and 1/140 of that of styrene-butadiene rubber. Therefore, it is mainly used for manufacturing various rubber products such as inner tubes, steam pipes, water tyres, dam bottom and gaskets.

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.