|Butyl rubber is a specialty rubber more frequently specified for its physical properties than chemical resistance. It has excellent shock absorption and vibration damping capabilities. Butyl's unusually low gas permeability makes it ideal for vacuum applications, while its high degree of unsaturation make it inherently resistant to atmospheric elements such as ozone and UV radiation. Additionally, butyl is thermally stable when cured with phenol-formaldehyde resins, and has a relatively high coefficient of friction.|
|Medium density copolymer of isobutylene and a small amount of isoprene.|
|Low temperature flexibility||•|
|Petroleum oils and fuels||•|
|-65 to 250 °F|
*Excellent, good, fair and poor are intended to serve as general guidelines only. Actual testing in the application environment is always recommended.