Description
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 and has a relatively high coefficient of friction.
Composition
Butyl Rubber
Physical Properties*
| |
Excellent |
Good |
Fair |
Poor |
| Abrasion resistance |
|
• |
|
|
| Compression Set |
|
• |
|
|
| Elongation |
|
• |
|
|
| Flame resistance |
|
• |
|
|
| Gas permeability |
• |
|
|
|
| Low temperature flexibility |
• |
|
|
|
| Tear resistance |
|
|
• |
|
| Tensile strength |
|
|
• |
|
Chemical Resistance*
| |
Excellent |
Good |
Fair |
Poor |
| Ketones |
|
• |
|
|
| Ozone |
• |
|
|
|
| Petroleum oils and fuels |
|
|
|
• |
| Silicone Fluids |
|
• |
|
|
| Weather |
• |
|
|
|
Operating Temperature
-40 to 275 °F
*Excellent, good, fair and poor are intended to serve as general guidelines only. Actual testing in the application environment is always recommended. |