Chloroprene Rubber (CR)

- Sep 01, 2017-

General Information
ASTM D2000                                        BC, BE

SAE J 200 Codes 
Relative Cost                                         Low

-40°~100°C     Special Compound     -55°~125°C
-40°~212°F     Special Compound      -67°~257°F

Primary Uses

  • Refrigeration industry applications

  • General purpose seals, hose and wire

Performs Well in…

  • Refrigerants - Freon®

  • Ammonia

  • Water and water solvents at low temperatures

  • Silicone grease and oils

  • Ozone, aging & weathering

Doesn’t Perform Well in…

  • Aromatic hydrocarbons (benzene)

  • Chlorinated hydrocarbons (trichloroethylene)

  • Nitro hydrocarbons

  • Polar solvents (ketones, esters, ethers, acetones)

  • Strong oxidizing acids

CR is one of the first synthetic rubbers used to produce seals and popularly known as Neoprene. Neoprene is a homopolymer of chloroprene (chlorobutadiene) d
eveloped by Dupont in 1931. It is unusual in that it is moderately resistant to both petroleum and weather (ozone, UV, oxygen). It is classified as a general-purpose elastomer which has relatively low compression set, good resilience and abrasion, and is flex cracking resistant. Neoprene is used extensively for sealing refrigerants like Freon® and ammonia. It also has excellent adhesion qualities to metals for rubber to metal bonding applications.

Application Advantages

  • Moderate resistance to both petroleum and weather

  • Good resistance to ozone, UV, oxygen

  • Excellent resistance to Freon® and ammonia


  • Neoprene has been largely replaced by Nitrile in the O-rings because Nitrile iseconomically competitive and generally has superior performance characteristics in most situations.

  • Moderate water resistance

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