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Ethylene Propylene Rubber (EPR, EPDM)

EPR copolymer ethylene propylene and ethylene-propylenediene rubber (EPDM) terpolymer are particularly useful when sealing phosphate-ester hydraulic fluids and in brake systems that use fluids having a glycol base.


Heat resistance

• Up to 150°C (302°F) (max. 204°C (400°F)) in water and/or steam)


Cold flexibility

• Down to approximately -57°C (-70°F)


Chemical resistance

• Hot water and steam up to 149°C (300°F) with special compounds up to 260°C (500°F)

• Glycol based brake fluids (Dot 3 & 4) and silicone-based brake fluids (Dot 5) up to 149°C (300°F)

• Many organic and inorganic acids

• Cleaning agents, sodium and potassium alkalis

• Phosphate-ester based hydraulic fluids (HFD-R)

• Silicone oil and grease

• Many polar solvents (alcohols, ketones, esters)

• Ozone, aging and weather resistant


Not compatible with:

Mineral oil products (oils, greases and fuels)

Parker Hannifin
O-Ring & Engineered Seals
2360 Palumbo Drive
Lexington, KY 40509
Ph: 859-269-2351
Fax: 859-335-5128