Ethylene Propylene Rubber (EPR, EPDM)

Ethylene Propylene Rubber (EPDM) elastomers have a fair tensile strength and excellent resistance to weathering and ozone, and chemical attack. They also exhibit excellent electrical insulation properties. Peroxide cured elastomers exhibit excellent heat ageing, and resistance to compression set from –40 to +150°C, more so if sulphur cured.

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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

Ethylene Propylene Rubber

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