EPDM rubber (ethylene propylene diene monomer rubber) is an elastomer which is characterized by wide range of applications. EPDM rubber is used in seals, glass-run channel; radiator, garden and appliance hose; tubing; washers; belts; and electrical insulation. It is also used as a medium for water resistance in high-voltage polymeric cable jointing installations, roofing membrane, geomembranes, rubber mechanical goods, plastic impact modification, thermoplastic, vulcanizates, as a motor oil additive, pond liner, electrical cable-jointing and chainmaille applications.

EPDM exhibits satisfactory compatibility with fireproof hydraulic fluids, ketones, hot and cold water, and alkalis, and unsatisfactory compatibility with most oils, gasoline, kerosene, aromatic and aliphatic hydrocarbons, halogenated solvents, and concentrated acids

originally developed in 1950s for tyre applications. Became more widely used because of its suitability for outdoor use.

Properties
• the most water resistant type of rubber - also very resistant to most water based chemicals
• very inert structure, remains stable over long periods of time
• can withstand temperatures of up to 130°C for extended periods of time (months)
• very good weathering resistance
• easily compounded and processed

Limitations
• will not resist oil or oil based products
• compression set not as good as some other rubbers, but can be improved by
careful compounding

Typical Applications
General engineering without exposure to oil