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EPDM O-Rings

Ethylene Propylene Rubber (EPM, EPDM)

EPM is a Copolymer of ethylene and propylene. EPDM is a terpolymer of ethylene and propylene with a small amount of a third monomer (usually a diolefin) to permit vulcanization with sulfur. Generally Ethylene Propylene Rubber posses excellent resistance to ozone, sunlight and weathering, and has very good flexibility at low temperature, good chemical resistance (many dilute acids, alkalis & polar solvents), and good electrical insulation properties.

Service Temperature

For EPDM the service temperature can be designed from -55° C to 125° C or up to 150° C (for peroxide cured systems).


40 to 90 Shore A are available.


Black, brown, green, white, rust, yellow, blue, red, orange, purple and gray are available, in addition to customer-assigned colors.


Ethylene Propylene Rubber (EPM) is a good choice for sealing parts in phosphate ester-based hydraulic fluids and glycol based brake fluid  systems.  EPDM is also is usually used in hot water or steam applications up to 150° C.

Ethylene Propylene Rubber is not suitable in petroleum fluids (fuels, mineral oils, greases)