Heat Hardening & Oxidation

Failure Pattern: Seen in both static and dynamic seals, the surface of the O-ring appears pitted and/or cracked, often accompanied by the flatness of high compression set.

Problem Sources: Excessive temperature causing elastomer hardening, evaporation of plasticizers and cracking from oxidation.

Suggested Solutions: Specify high temperature O-ring materials with antioxidants... Lower operating temperature.