Failure Pattern
Seen in both static and dynamic seals, when heat hardening and oxidation occurs, 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

O-RING RULE OF THUMB #12

When it is said that an elastomer is good for an application it is meant that some compounds which include that material are acceptable. Not All. For instance, some compounds of EP are good for brake fluid applications, but most are not acceptable. » Learn More