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EPDM O-Rings

We are a trustable China EPDM o-rings manufacturer and can produce high-quality rubber seals for you.

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EPDM o-rings (also known as EPR o-rings or Ethylene Propylene o-Rings) are made of EPDM rubber, and their most important feature is their excellent resistance to oxidation, ozone, and corrosion.

EPDM rubber is a terpolymer of ethylene, propylene, and non-conjugated dienes. Since EPDM rubber belongs to the polyolefin (PO) family, it has excellent vulcanization characteristics. Among all rubbers, EPDM rubber has the lowest specific gravity and can absorb a large number of fillers and oils without much impact on properties.


  • Material: EPDM / EPR / Ethylene Propylene Diene Monomer
  • Temperature Range / Rating: -50 °C (-58 °F) to 150°C (302 °F)
  • Low Operating Temperature Limit: -50 °C (-58 °F)
  • High Operating Temperature Limit: 150°C (302 °F)
  • Durometer Hardness Range: Shore A 40-90
  • Standard Durometer Hardness: Shore A 70
  • Color: Black (standard), custom color is available
  • Outline: Round, square, rectangular, custom
  • Cross Section Shape: Round
  • Cross Section Width (CS): 0.5 to 20 mm (0.020 to 0.787 inch)
  • Inside Diameter (ID): 0.7 to 2965 mm (0.028 to 116.732 inch)
  • Standard Size: AS 568, BS 1806, ISO 3601, DIN 3771, JIS B 2401
  • Shelf Life: 5 – 10 years
  • Price Level: Common


EPDM o-rings have excellent weather resistance, aging resistance, ozone resistance, and chemical stability, and they are resistant to Freon and a variety of refrigerants. EPDM o-ring seals also have good compatibility with glycol-based brake fluid.

Chemical Resistance Properties






Commonly used in high-temperature water vapor environment seals, sanitary equipment seals or parts, as well as refrigerators and refrigeration equipment seals, etc.

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