EPDM Sealing Rings Explained: Temperature Range, Chemical Resistance, and Service Life

EPDM Sealing Rings Explained: Temperature Range, Chemical Resistance, and Service Life

Sealing components are essential in both daily life and industrial applications. They not only prevent fluid or gas leakage but also ensure the long-term reliability of equipment. Among various sealing materials, EPDM (Ethylene Propylene Diene Monomer) stands out for its unique properties. The following sections outline the main characteristics of EPDM sealing rings.

Temperature Resistance

Standard EPDM operates between -40℃ and 100℃, and can withstand extreme conditions of -55℃ (20 min) to 120℃ (20 min).

Peroxide-cured EPDM performs better at higher temperatures, with an operating range of -40℃ to 125℃, and extreme endurance from -55℃ (20 min) to 150℃ (20 min).

Chemical Stability
EPDM is resistant to acids, alkalis, and detergents, but it is not suitable for environments containing mineral oils.

Mechanical Performance & Service Life
EPDM sealing rings can meet the IP67 waterproof standard (50m underwater) and have a service life of up to 25 years under normal use.

Weather Resistance
Under exposure to 50PPhm ozone concentration at 40℃ for 72 hours, EPDM remains crack-free, showing excellent weatherability.

Flame Retardancy
The material complies with the UL-94 V0 flame-retardant standard.

Color Options
Black accounts for about 90% of applications, though other colors can be produced if required.

Conclusion
In summary, EPDM sealing rings combine temperature resistance, weather durability, and long service life, making them suitable for a wide range of environments. These properties explain why EPDM has become one of the most widely used sealing materials in modern applications.