EPDM (ethylene propylene diene monomer rubber) is the second most common elastomer material used in the manufacture of seals. EPDM has excellent resistance to UV radiation and ozone and has good compatibility with water, steam and low temperatures. EPDM also has good mechanical properties and covers most approvals.
While EPDM exhibits good resistance to glycol-based brake fluids, it is incompatible with most oils and greases.
EPDM soufre et EPDM peroxyde
Techné offers peroxide cured EPDM and sulfur cured EPDM. The two types of EPDM differ in the chemical agent used for creating their molecular bonds.
Due to more stable molecular bonds, peroxide cured EPDM exhibits better resistance to high temperatures compared to sulfur cured EPDM: While sulfur cured EPDM can be used for temperatures up to 100 °C, peroxide cured EPDM withstands higher temperatures, up to 150 °C. Peroxide cured EPDM resists aging and compression and often has more certifications (for food, pharmaceuticals, water). The hardness of sulfur cured EPDM is higher, providing better tensile and tear resistance. Sulfur cured EPDM is often a more cost-effective solution compared to peroxide cured EPDM.
Sulphur cured EPDM
Peroxide cured EPDM
Fields of application and products
EPDM is mainly used in water applications such as drinking water, raw water, seawater and steam.
Other applications :
- Applications with UV radiation and ozone
- Household appliances
- Sanitary fittings
- Medical equipment
- Food processing machinery
EPDM parts can be stored in the open air or in the vicinity of ozone.
Versions and approvals
En fonction du mélange, l’EPDM au peroxyde dispose d’une multitude d’homologations :
Food industry
- FDA
- CE 1935/2004
- GB 4806 / GB 9685
- 3A
- NSF51
Drinking water
- WRAS
- UBA
- W270
- W534
- ACS
- CLP
- NSF61
- TGM
- D.M. 06/04/2004 n°174
- KIWA
Pharmaceutical industry
- UPS classe VI
This list is not exhaustive. The Techné engineer office is at the disposal of the group's customers for further information. Specific approved NBR compounds can be developed on request.
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