EPDM (Ethylene Propylene Diene Monomer) rubber is a synthetic rubber with the following performance characteristics:

It possesses strong resistance to UV rays, ozone, and extreme weather conditions, making it highly suitable for outdoor applications. EPDM rubber can withstand a wide range of temperatures, from hot to cold, without losing its elasticity or structural integrity. It exhibits excellent resistance to various chemicals, acids, and alkalis, and is also waterproof, commonly used in applications requiring watertight seals.

It is widely used in roofs and building components, providing weather-resistant sealing to screws or fasteners.

EPDM washers come in various shapes and sizes, and can be used with different types of fasteners.