Ethylene Propylene Diene Monomer Rubber (EPDM)

Ethylene Propylene Diene Monomer Rubber, EPDM, is a type of synthetic rubber that is used in a wide variety of applications. Its main physical properties are outstanding heat, ozone and weather resistance. It is generally resistant to animal and vegetable oils, ozone, strong and oxidizing chemicals. It is generally attacked by mineral oils and solvents and aromatic hydrocarbons. It is used extensively in vehicle seals, hose, tubing, washers, belts, o-rings and moisture seals.

Properties and Characteristics

  • Specific Gravity: .85
  • Tensile Strength, psi – Pure Gum: 300
  • Tensile Strength, psi – Reinforced: 2500
  • Practical Shore A Hardness Range: 40–90
  • Resilience, Room Temperature: Good – Excellent
  • Resilience, Hot: Good – Excellent
  • Tear Resistance: Fair – Good
  • Abrasion Resistance: Good
  • Atmosphere Aging Resistance: Excellent
  • Oxidation Resistance: Excellent
  • Heat Resistance: Excellent
  • Low Temperature Flexability: Excellent
  • Compression Set: Fair – Good
  • Permeability: Good – Excellent
  • Flame Resistance: Poor
  • Acid Resistance – Dilute: Good – Excellent
  • Acid Resistance – Concentrated: Good – Excellent
  • Moisture Resistance: Excellent
  • Solvent Resistance Hydrocarbons: Poor
  • Oxygenated Solvents: Excellent
  • Oil and Gasoline: Poor
  • Animal and Vegetable Oils: Good
  • Dielectric Properties: Poor

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