Butyl Rubber

also known as isobutylene-isoprene rubber (IIR), is a synthetic rubber that is known for its exceptional impermeability to gases, excellent resistance to heat, weathering, and chemicals. Here are some key characteristics and common uses of butyl rubber.

Key Characteristics:

Gas Impermeability:

Butyl rubber has one of the lowest gas permeability rates among rubber materials, making it ideal for applications requiring airtight seals or barriers. It is used extensively in tire inner liners and inner tubes.

Weather and UV Resistance:

Butyl rubber exhibits good resistance to sunlight (UV), ozone, and weathering, making it suitable for outdoor applications.

Chemical Resistance:

It is highly resistant to a wide range of chemicals, acids, and bases, which makes it useful for applications in contact with corrosive substances.

Heat Resistance:

Butyl rubber can withstand relatively high temperatures without significant degradation.


It remains flexible at low temperatures, making it suitable for applications in cold environments.

Electrical Insulation:

It has good electrical insulation properties, which can be important in certain applications.

Common Uses
of Butyl Rubber:

Pharmaceutical Stoppers
Gaskets and O-rings
Vibration Dampers
Sports Equipment

Butyl rubber’s unique combination of properties makes it valuable in a wide range of applications where the impermeability to gases, weather resistance, and chemical resistance are essential.