design guide

Chlorosulfonated Polyethylene (CSM)/Hypalon®

Chlorosulfonated polyethylene is the base polymer for CSM synthetic rubbers.

Chlorosulfonated polyethylene compounds provide excellent ozone, oxidation, sunlight (color degradation), and weather resistance. They are also capable of providing excellent resistance to alkalis and acids.

Compound 399ES, 399BL

  • Acid resistant, "general purpose" type elastomers
  • Oil resistance similar to polychloroprene while operating at higher temperatures
Compound Hardness
Shore A
Tensile Elongation
MPa psi
399ES 60 12.4 1800 400
399BL 70 13.8 2000 300