310 – CSM Rubber (Hypalon®) (Chlorosulphonated Polyethylene Rubber)

Temperature range:

-35° to +140°C (-31°F to +284°F)



CSM rubber, also known as chlorosulphonated polyethylene (CSPE) or by the former brand name Hypalon® is renowned for its excellent resistance to adverse atmospheric conditions and its waterproofing and acid-proofing and alkaline-proofing capacities.

It is noted for its resistance to chemicals, as well as excellent resistance to weather, ozone, heat and abrasion. It also has Fair resistance to petroleum based fluids and acids, temperature extremes, and ultraviolet light.



It is mainly used in the construction and electrical industries for its impermeability capacities, but it is also frequently used for seals and equipment protection for the chemical and automotive industries.


EMI ReferenceSpecificationHardness IRHDSGTensile Strength (MPa)Elongation at Break %Colour
310 - H601Commercial60°1.315.7350Black
310 - H651Commercial65°1.49.8350Black
310- H701Commercial70°1.46.9400Black
310 - H702Special70°1.411350Black


Full data sheets for all grades are available on request.

* The information above is supplied in good faith and believed to be correct. This information is supplied upon the condition that persons receiving this will make their own determination as to its suitability for their purposes prior to use. EMI makes no representations or warranties, either expressed or implied with respect to the information or the product to which this information refers.