Greene, Tweed’s Chemraz® 615 exhibits outstanding high-temperature properties, with a temperature range from 0°F to 615°F (-18°C to 324°C). Chemraz® 615’s chemical resistance and low compression set characteristics combine to out perform tin-cured perfluoroelastomers.

Chemraz® 615 shows lower compression set at high temperatures and a higher retained sealing force than other perfluoroelastomers available.

Because Chemraz® 615 allows for the use of higher process operating temperatures, it is ideal for a range of markets, from chemical process to petroleum refining. This superior perfluoroelastomer (FFKM) performs well in a variety of fluids such as inorganic and organic chemicals, acids, reagents, heat transfer fluids and hydrocarbons.

Chemraz® 615 is available in standard O-rings and custom shapes for a range of equipment, from pumps and valves to agitators and mixers, from mechanical seals and process control instruments to heat exchangers and diagnostic equipment.

Features & Benefits

  • Low compression set at continuous temperatures up to 615°F (324°C)
  • Ability to handle severe thermal cycles, meaning longer life and lower downtime costs
  • Does not stick at high temperatures
  • Superior service life in a variety of media, including heat transfer oils
  • Excellent chemical resistance


  • Mechanical seals
  • Process control instruments
  • Heat exchangers
  • Valves
  • Agitators & mixers
  • Pumps
  • Couplings