Chlorosulphonated Polyethylene Rubber (CSM)

Chlorosulphonated Polyethylene Rubber (CSM)  sheeting is known for its resistance to ozone and strong sunlight. You may also know this polymer by one of its brand names, such as Hypalon® (no longer available), Hailon, Lianda or TOSO-CSM®.

Chlorosulphonated polyethylene  Rubber (CSM) is resistant to chromic, nitric, sulfuric and phosphoric acids and alkalis like chlorine dioxide, and hydrogen peroxide. CSM is often used in products which are in contact with sulfuric acid or nitric acid due to its excellent acid resistance. It’s resistance to acids and alkalis make it a great choice for chemical processing applications.

Chlorosulphonated polyethylene rubber also provides good fire resistance and is considered to be self-extinguishing. Its abrasion resistant properties combined with its fire resistance make CSM an excellent polymer for applications in mining operations.

Chlorosulphonated Polyethylene Rubber

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Description Durometer Tensile (Min PSI) Elongation (%) Temperature Range (F) Specification Conforms to ASTM D20000 Spec Sheet Quote





-40° F to 250°F

ASTM D2000 M2CE608A16B15F17

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Additional properties include good resistance to oxygen, ozone and sun light. Chlorosulphonated polyethylene rubber is oil resistant with low gas permeability and offers excellent UV stability. It also provides some resistance to compression set, select oils and grease. Properties of chlorosulphonated polyethylene rubber are often compared to Neoprene, although CSM provides better UV resistance.

Common uses of chlorosulphonated polyethylene rubber include mining operations, mass transit, chemical processing and other applications requiring fire resistance. Chlorosulphonated polyethylene rubber is not recommended for applications requiring fuel resistance. All BRP rubber products are American-made in their Lima, Ohio facility.

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