EPDM – Ethylene Propylene Diene Rubber

Ethlylene Propylene Diene Monomer (EPDM) is a copolymer of ethylene and propylene and a smaller amount of a diene monomer which forms chemically unsaturated ethylene groups pendant from the main saturated chain. These facilitate cross-linking reactions which do not affect the integrity of the polymer backbone.

  • EPDM has excellent heat, ozone and chemical resistance.
  • Physical properties are good and resistance to polar fluids is generally good.
  • Low temperature resistance is excellent and EPDM can be compounded to give excellent electrical resistance.
  • EPDM is not suitable for exposure to petroleum based fluids and di-ester lubricants.
  • Typical applications include accumulator bladders, cable connectors and insulators, diaphragms, gaskets, hoses and seals.
  • Potable water (WRAS) grades are available as well as ‘Food Quality’ mixes suitable for the food and pharmaceutical industries.
  • Typical working temperature range: – 45°C to +125°C, up to 150°C for peroxide cured EPDM.