Polyurethane Rubber Material | AU/EU | Seal & Design

AU EU Polyurethane       ASTM D 2000, SAE J200 Type / Class: BG (Millable)

General Characteristics

One must differentiate between polyester urethane (AU) and polyether urethane (EU). AU type urethanes exhibit better resistance to hydraulic fluids. Polyurethane elastomers, as a class, have excellent wear resistance, high tensile strength and high elasticity in comparison with any other elastomers. Permeability is good and comparable with butyl rubber.

Temperature Properties

Heat Heat Resistance Up to approximately 180°F (82°C).
Cold Cold Flexibility Down to approximately –40°F (–40°C).


Chemical Resistance Chemical Resistance
  • Pure aliphatic hydrocarbons (propane, butane, fuel)
  • Mineral oil and grese
  • Silicone oil and grease
  • Water up to 125°F(50°C) (EU type)
  • Ozone and aging resistance
Not compatible NOT compatible
  • Ketones, esters, ethers, alcohols, glycols
  • Hot water, steam, alkalis, amines, acids

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