Ethylene Propylene (EPDM)
EPDM is resistant to water, extreme weather, ozone, oxidisation and long lasting.
Typical applications
- Automotive weather strip
- Building weather strip
- Heating/cooling hose
- Diaphragms
- Electrical cable insulation
Advantages
Disadvantages
Properties
Resistance
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
Properties
| 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% |
Resistance
| 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 |
