Chlorosulfonated Polyethelene (CSPE) Polymer:
Properties, Characteristics and Resistances

General Information

Common Name:

Chlorosulfonated Polyethelene, CSPE, Hypalon® (discontinued in 2009)

Chemical Name:

Chlorosulfonated Polyethylene

Generally Resistant To:

Gases, Aliphatic Hydrocarbons, Extreme Temperature, Sunlight, Ozone, Abrasion, Stain and Oxidation.

Generally Attacked By:

Steam, Vegetable Oils, and Laquer Solvents

ASTM D 2000 / SAE J200 Classification:

CE

MIL-R-3065 / SAE J-14 / MIL-STD-417 Classification:

SC

ASTM D-1418 Designation:

CSM

Physical Properties

Elongation:

100 to 700%

Hardness Range (Durometer Shore A):

40 to 90

Mechanical Properties

Compression Set:

Fair to Good

Rebound Rating:

• Cold:

  Fair to Good

• Hot:

  Good

Flex Cracking Resistance:

Fair to Very Good

Abrasion Resistance:

Very Good to Excellent

Tear Resistance:

Fair to Good

Impact Resistance:

Good to Very Good

Flame Resistance:

Good

Thermal Properties

Minimum Service Temperature:

-30°F to -70°F

Maximum Service Temperature:

+250°F to +300°F

Environmental Resistance

Recommended Shelf Life:

5 to 10 years

Weather Resistance:

Excellent

Sunlight Resistance:

Excellent to Outstanding

Ozone Resistance:

Excellent

Oxidization Resistance:

Excellent

Water Resistance:

Good

Steam Resistance:

Poor to Good

Gas Permeability:

Good to Excellent

Radiation Resistance:

Good, 1 x 10⁵ Ga Gy

Poor, 7 x 10⁵ Ga Gy

Chemical Resistance

Acetone:

Minor to Moderate Effect

Amonium Hydroxide:

Recommended: Little to Minor Effect

Animal Fats:

Minor to Moderate Effect

Carbon Dioxide:

RECOMMENDED: Little or Minor Effect

Chlorine:

• DRY:

  Minor to Moderate Effect

• WET:

  Moderate to Severe Effect

Fluorine (Liquid):

- - -

Fuel Oil:

Minor to Moderate Effect

Gasoline:

Minor to Moderate Effect

Hydrochloric Acid 37%:

• HOT:

  Moderate to Severe Effect

• COLD:

  RECOMMENDED: Little or Minor Effect

Hydrochloric Acid Concentrate 37%:

• HOT:

  Moderate to Severe Effect

• COLD:

  RECOMMENDED: Little or Minor Effect

Kerosene:

Moderate to Severe Effect

Methyl Ethyl Ketone:

NOT RECOMMENDED

Mineral Oil:

Minor to Moderate Effect

Naptha:

NOT RECOMMENDED

Natural Gas:

RECOMMENDED: Little or Minor Effect

Nitric Acid:

• Concentrate:

  Minor to Moderate Effect

• Dillute:

  RECOMMENDED: Little or Minor Effec

• Red Fuming:

  NOT RECOMMENDED

Petroleum:

• Below 250:

  Minor to Moderate Effect

• Above 250:

  NOT RECOMMENDED

Phosphoric Acid:

• 20%:

  RECOMMENDED: Little or Minor Effect

• 45%

  : Minor to Moderate Effect

Propane:

RECOMMENDED: Little or Minor Effect

Salt Water:

RECOMMENDED: Little or Minor Effect

Skydrol:

• Skydrol 500:

  NOT RECOMMENDED

• Skydrol 7000:

  NOT RECOMMENDED

Sodium Hydroxide:

RECOMMENDED: Little or Minor Effect

Sulfuric Acid:

• Concentrate:

  Minor to Moderate Effect

• Dillute:

  RECOMMENDED: Little or Minor Effect

• 20% Oleum:

  NOT RECOMMENDED

Toluene:

NOT RECOMMENDED

Transformer Oil:

Minor to Moderate Effect

Vegetable Oils:

Minor to Moderate Effect

Vinegar:

RECOMMENDED: Little or Minor Effect

Recommended Storage Conditions

• Store in a cool, dry place with temperature below 75°F.
• Keep away from direct heat or open flames.
• Avoid contact with solvents or other fluids.
• Do not store in direct sunlight.
• Keep products wrapped or sealed to minimize the absorption of moisture.
• Store in a relaxed condition free from tension, compression or other deformation.

Data presented here was gathered from several sources including Uniroyal Chemical Company, Inc., The Los Angeles Rubber Group, Inc., and Compass Publications.

Hypalon® is a registered trademarks of DuPont Performance Elastomers.