Common Names:
Ethylene Propylene, EP, EPDM

Description:

This material was introduced in 1961 and found broad acceptance in applications requiring excellent resistance to Skydrol and other phosphate ester fluids at higher temperatures. In addition, compounds of this material exhibit excellent resistance to automotive brake fluids and steam.

Recommended Temperature Range:
The temperature service range for these compounds is -65°F to +300°F, although no one formulation may exhibit the total range.

Common Names:
Silicone, VMQ

Description:

Silicones are noted for their excellent heat resistance, and are utilized in applications which expose seals to high temperature dry heat. They are not recommended for dynamic applications due to their relatively poor tensile and tear strength. They exhibit the best low temperature flexibility of all elastomers and can be used in static applications to -150°F. Silicones should be considered to be non-petroleum resistant, but can be used in specific high aniline point petroleum oils.

Recommended Temperature Range:
The temperature service range for silicone compounds is -80°F to 450°F (All silicone formulations do not exhibit the capability of this entire range).

Common Names:
Neoprene, Chloroprene, CR

Description:

​This was the earliest of the volume American synthetic rubbers. Compounds from neoprene exhibit fair oil resistance, good ozone and weather resistance. Due to the excellent resistance to refrigerants such as Freon, neoprene compounds are used in refrigeration systems. 

Recommended Temperature Range:
The sealing temperature service range for these compounds is -65°F to +250/300°F, although no one formulation may exhibit the total range.

• Styrene Butadiene (SBR or Buna-S)