EPDM (ethylene-propylene-diene rubber, buna AP, keltan, dutral, EP, EPT, EPR)

Ethylene-propylene-diene rubber is an amorphous synthetic rubber, obtained by copolymerization of ethylene, propylene and a small share of diene monomer. It is often used for sealing brake systems, and also to seal hot water or steam. However it is advised to avoid contact of EPDM with petroleum oils, mineral oils or fuels. It is extremely resistant to ozone, has excellent chemical properties and it is compatible with many polar liquids which have a negative impact on other elastomers. It is also well resistant to aging, changing weather conditions and heat. Its most distinctive feature is great elasticity. Usage: O-rings, gaskets, brake systems, water supply systems, products exposed to ozone, automotive cooling systems, general industrial use, injection molded products, manufacture of soft hoses and cables. Advantages: • excellent resistance to changing weather conditions, as well as to mild acids, alkalis, detergents, silicone oils, greases, ketones and alcohols, • good resistance to heat, • great elasticity. Disadvantages: • poor resistance to gasoline and mineral oils. Temperature resistance: from – 50 °C to 130 °C. Hardness: 20 to 95 Shore A.