Material Selection Guide

CHLOROPRENE RUBBER (CR)

Chloroprene 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.

Heat resistance:

• Up to approximately 121°C (250°F)

Cold flexibility:

• Down to approximately -40°C (-40°F)

Chemical resistance:

• Paraffin based mineral oil with low DPI, e.g. ASTM oil No. 1
• Silicone oil and grease
• Water and water solvents at low temperatures
• Refrigerants
• Ammonia
• Carbon dioxide
• Improved ozone, weathering and aging resistance compared with nitrile

Limited compatibility:

• Naphthalene based mineral oil (IRM 902 and IRM 903 oils)
• Low molecular weight aliphatic hydrocarbons (propane, butane, fuel)
• Glycol based brake fluids

Not compatible with:

• Aromatic hydrocarbons (benzene)
• Chlorinated hydrocarbons (trichloroethylene)
• Polar solvents (ketones, esters, ethers)