Vespel is a high performance polyimide material.  It is one of the highest performing engineering plastics currently available. Vespel will not melt and can operate continuously from cryogenic temperatures to 550°F (288°C) with excursions to 900°F (482°C). Vespel components consistently exhibit superior performance in a variety of applications requiring low wear and long life in severe environments. It can be used for rotary seal rings, thrust washers and discs, bushings, flanged bearings, plungers, vacuum pads, and thermal and electrical insulators.  Its one drawback is its relatively high cost.  A ¼” diameter rod, 38” long, can cost $400 or more.

Grades: Property Data