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Polymer Types - EPDM - Ethylene Propylene Diene Rubber...

Clwyd reference EPDM
ASTM classification EP(D)M

Copolymer of ethylene and propylene (EPM) or terpolymer of ethylene, propylene and a diene cure site monomer  (EPDM)

Typical applications O-rings, seals and components for potable water seals, taps etc, brake systems, automotive cooling systems, nuclear cooling systems, outdoor exposure applications
Advantages

Excellent steam resistance
Good ozone and weathering resistance
Good low temperature flexibility

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

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