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Ethylene Propylene Rubber (EPR, EPDM) Seals

Last Updated: Feb 05, 2013 02:57PM EST
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)

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