Ethylene propylene diene monomer (M-class) rubber is a synthetic elastomer (rubber) with high resistance to weather and ozone as well as high thermal stability. Due to its high elasticity and chemical resistance, it is used for various types of seals, such as for example O-rings for shaft seals or also for flat seals.

EPDM is commonly used for steam and hot water hoses, weatherproof foils and close-pored foam mats.