Neoprene O-Rings & Gaskets | Seal & Design Inc.

Neoprene (CR)

AflasNeoprene was the first synthetic rubber developed commercially and exhibits generally good ozone, aging and chemical resistance. It has good mechanical properties over a wide temperature range. Improved ozone, weathering and aging resistance compared with nitrile rubber.

Both o-rings and gaskets can be made from Neoprene materials.

Names: Chloroprene, CR, Neoprene®

Compound Info
ASTM D1418 Designation CR
ASTM D2000/SAE J200 Type, Class BC, BE
Hardness (Shore A) 40-90
Color black
Thermal Properties
Min Temp. -40°F (-40°C)
Max Temp. 250°F (121°C)


Chemical Resistance
Chemical Resistance
  • Paraffin base mineral oil with low DPI, e.g. ASTM oil No.1
  • Silicone oil and grease
  • Water and water solvents at low temp.
  • Refrigerants
  • Ammonia
  • Carbon dioxide
Limited Compatibility
Limited Compatibility
  • Naphthalene based mineral oil (IRM 902 and IRM 903 oils)
  • Low molecule aliphatic hydrocarbons (propane, butane, fuel)
  • Glycol based brake fluids
Not compatible
NOT compatible
  • Aromatic hydrocarbons (benzene)
  • Chlorinated hydrocarbons (trichloroethylene)
  • Polar solvents (ketones, esters, ethers, acetones)

Disclaimer: These are general guidelines only. All materials should be tested in your application.