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DuPont Mobility and Materials Kalrez® 8900 Fluoroelastomer
Categories: Polymer; Thermoset; Fluoropolymer, TS; Thermoset Fluoroelastomer; Rubber or Thermoset Elastomer (TSE)

Material Notes: DuPont™ Kalrez® 8900 perfluoroelastomer parts are a black product for all thermal processes, e.g., oxidation, diffusion furnace, metal CVD, ALD and LPCVD. It offers outstanding thermal stability, very low outgassing and excellent (low) compression set properties. Kalrez® 8900 parts exhibit excellent retention of physical properties at elevated temperatures, have excellent mechanical strength and are well-suited for both static and dynamic sealing applications. A maximum continuous service temperature of 325 °C is suggested. Short excursions to higher temperatures may also be possible. Ultrapure post-cleaning and packaging is standard for all Kalrez® 8900 parts.


  • Outstanding thermal stability
  • Excellent (low) compression set properties
  • Very low outgassing properties
  • Very low moisture content
  • Excellent retention of physical properties at elevated temperatures
  • Excellent resistance to fluorine gas

Suggested Applications

  • Quartz Tube Seals
  • Plenum Seals
  • Chamber Seals
  • Fittings
  • Center Ring Seals

Information provided by DuPont

Available Properties
  • Density, ISO 1183
  • Hardness, Shore A, ASTM D 2240
  • Elongation at Break, ASTM D 412
  • 100% Modulus, ASTM D 412
  • CTE, linear, ISO 11359-1/-2
  • Maximum Service Temperature, Air, DuPont proprietary test
  • Minimum Service Temperature, Air, ASTM D 1329, Retraction temperature TR-10
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Manufacturer Notes:
DuPont Performance Polymers (Former DuPont Elastomers)

Category Notes

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Arkema PEKK
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