EPDM – one of the most frequently used elastomers in outdoor applications 

What is ethylene propylene diene rubber (EPDM)?

Ethylene propylene diene monomer rubber (EPDM) is a synthetic rubber that is distinguished by its outstanding resistance to weathering, ozone, and ageing. It is produced from ethylene, propylene, and a small proportion of a diene, which allows for vulcanisation.

Due to its saturated polymer structure, EPDM is particularly resistant to environmental influences and thermal ageing, making it one of the most commonly used elastomers in outdoor applications. In practice, EPDM is therefore widely used in the manufacture of Moulded rubber parts such as seals, profiles and mouldings for outdoor use – but also as a material for Rubber composite parts, where its weather resistance is particularly advantageous in combination with metallic or other carrier materials.

 

What properties does Ethylene Propylene Diene Rubber (EPDM) have?

  • Excellent weather, ozone and UV resistance even without protective additives
  • Temperature resistance of approx. -50 °C until +130 °C
  • Very good resistance to hot water, water vapour, glycol-based brake fluids and many polar chemicals
  • Good elasticity even at low temperatures
  • High electrical insulation capacity
  • Poor resistance to mineral oils, fuels and aromatic hydrocarbons
  • Good mixing and processing properties for complex geometries in mould making

 

What are the application areas and material combinations for Ethylene Propylene Diene Rubber (EPDM)?

EPDM is preferably used in Seals, Sealing lips, hoses, diaphragms and Vibration dampers especially in the construction, automotive and electrical industries. Typical applications include door and window profiles, roof seals, cooling water hoses, cable sheathing and O-rings for hot water and steam systems.

For use in Rubber-metal composite parts or Rubber-fabric composites durable, weatherproof assemblies are created. Thanks to its resistance to water and chemicals, EPDM is also used in the food and drinking water industry, often with corresponding certification.