CSM – Chlorosulphonated Polyethylene (Hypalon®)

Chlorosulphonated Polyethylene (CSM), widely known as Hypalon®. Can in some respects be regarded as a superior type of chloroprene, having better heat ageing, chemical resistance and excellent low gas permeability.

  • Ozone and weathering resistance is also excellent and electrical properties are good.
  • Low temperature flexibility and oil resistance is similar to chloroprene.
  • CSM has poor fuel resistance and dynamic sealing applications are not recommended in view of its poor compression set.
  • Typical applications include static seals and electrical cable jacketing.
  • Typical working temperature range: -20°C +125°C

Hypalon® was a registered trademark of DuPont Performance Elastomers