Manufactured by Greene, Tweed & Company and Supplied by Ace Glass Inc. Molded of perfluoroelastimer polymer, CHEMRAZ has the broadest chem- ical resistance of any elastomeric material. Combines the resiliance and sealing force of an elastomer with chemical resistance approaching that of PTFE. Resistant to swelling and embrittlement, easily in- stalled, conforming, not likely to creep or cold flow.