ETHYLENE-PROPYLENE (EPDM)
Ethylene-propylene compounds are used frequently to seal in brake systems, and for sealing hot water and steam. Ethylene propylene compounds have good resistance to mild acids, detergents, alkalis, silicone oils and greases, ketones, and alcohols. They are not recommended for applications with petroleum oils, mineral oil, di-ester lubricants, or fuel exposure.
Ethylene Propylene has gained wide seal industry acceptance for its excellent ozone and chemical resistance properties and is compatible with many polar fluids that adversely affect other elastomers.
EPDM compounds are typically developed with a sulfur or peroxide cure system. Peroxide-cured compounds are suitable for higher temperature exposure and typically have improved compression set performance.
Temperature Range (dry heat)
Standard Compound: -40°C to +150°C
Primary Uses
standard and special sealing applications as hydraulic or rotary seal, O-rings, flange seals and gaskets
Water system seals, faucets, etc.
Brake systems
Ozone exposure applications
Automotive cooling systems
General Industrial Use
Application Advantages
» Exceptionally good weather aging and ozone resistance
» Excellent water and chemical resistance
» Excellent resistance to gas permeability and aging due to exposure to steam
» Good in ketones and Alcohols
» Good heat resistance
» Good low temperature flexibility
Application Disadvantages
» Poor petroleum oil and solvent resistance
» Not recommended for food applications
» Not recommended for exposure to aromatic hydrocarbons
