Ethylene Propylene Diene Monomer Rubber

Clwyd reference	EPDM
ASTM classification	EPDM
Typical applications	Automotive weather strip Building weather strip General extruded profiles Heating/cooling hose Diaphragms Electrical cable insulation
Advantages	Provides excellent resistance to ozone and weathering Chemically inert – good resistance to chemicals Particularly suited to extrusion processes, especially continuous vulcanisation Good insulation properties
Disadvantages	Poor tack and adhesion – can be difficult to bond Not oil resistant

Available hardness range (Shore A)	25 - 95
Upper continuous service temp.	150°C
Min. temp. for sealing applications	-55°C
Minimum non-brittle temp.	-70°C
Tensile strength (up to)	23 MPa
Elongation at break (up to)	450%

Price Bracket	Very low
ASTM 1 Oil	None
ASTM 2 Oil	None
ASTM 3 Oil	None
Kerosene	None
Liquid B	None
Liquid 101	None
Phosphate ester	Good
Ketone	Excellent
Toluene	None
Iso-octane	None
Methanol	Excellent
Acid (weak)	Good
Acid (strong)	Average
Base (weak)	Excellent
Base (strong)	Good
Hydrogen sulphide	Excellent
Steam	Excellent
Ozone	Excellent
Radiation	Excellent