Neoprene O-Ring (Chloroprene Rubber) Material Description


Chloroprene (CR), also known by its trade name “Neoprene”, was one of the first successful synthetic elastomers in 1931 made by DuPont. It is prepared by emulsion polymerization of chloroprene, or 2-chlorobutadiene.

Neoprene is a multi-purposed elastomer which yields a balanced combination of properties. Neoprene o-rings are typically seen in the refrigeration sector, as they demonstrate remarkable resistance to chemicals such as ammonia and a variety of coolants.

Neoprene o-rings also perform well in contact with oils and many chemicals and has good resistance to sun, ozone and weather. The material displays outstanding toughness and good resistance to fire.

Neoprene o-rings typically are black in color, with a shelf life of 15 years.

Additional information regarding applications, advantages, limitations, and more can be read in our All About Neoprene O-Rings article.

Cure System: Sulfur-Cured

Standard neoprenes are metal oxides and organic accelerators.

Neoprene O-Ring Temperature Range:

Standard Low Temp: -40°C (-40°F)
Standard High Temp: 100°C (212°F)

SPEC SHEET: Chloroprene Rubber (CR) 70 Durometer


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Preferred Environments to Use Neoprene O-Rings

Performs Well In:

  • Refrigerants
  • Ammonia
  • Water
  • Silicone grease and oils
  • High aniline point mineral oil

Doesn't Perform Well In:

  • Aromatic hydrocarbons
  • Ketones
  • Esters
  • Ethers
  • Strong oxidizing acids
  • Chlorinated hydrocarbons