Neoprene O-Ring » Chloroprene Orings and CR O-Rings

Neoprene is a homopolymer of chlorobutadiene and unusual in that it is moderately resistant to both petroleum oils and weather (ozone, UV, oxygen). Neoprene o-rings are commonly used in the refrigeration industry due to excellent resistance to ammonia, Freon® and the o-rings wide range of operating temperatures (- 40 °F to 250 °F). Neoprene o-rings are also referred to as chloroprene o-rings or a CR o-ring. Columbia offers a complete selection of both the standard AS568 o-ring and metric o-ring sizes. Columbia can also develop custom neoprene o-rings to customer applications or specifications.

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Neoprene O-Ring » Chemical Compatibility Overview

Neoprene
Chemical Resistance
Very
Good
Good
Fair
Poor
Ammonia 1      
Aromatic Hydrocarbons       4
Brake Fluids Non-Petroleum     3  
Carbon Dioxide 1      
Chlorinated Hydrocarbons       4
Glycol Base Brake Fluids     3  
Petroleum, Crude   2    
Polar Solvents (Ketones)       4
Propane, Butane & Fuel   2    
Refrigerants 1      
Silicone Oils & Greases 1      
Steam to 500ºF       4
Water 1      

Neoprene Compound » Chemical Compatibility Lookup

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*Due to the number of interacting forces, it is STRONGLY RECOMMENDED THAT YOUR ELASTOMER SELECTION BE RIGOROUSLY TESTED IN THE ACTUAL APPLICATION, performance assumptions must be checked so that you are certain that all variables have been carefully considered.

Neoprene O-Rings » Physical Properties Overview

Neoprene
Physical Properties
Very
Good
Good
Fair
Poor
Abrasion Resistance   2    
Acid Resistance     3  
Chemical Resistance     3  
Cold Resistance     3  
Compression Set Resistance     3  
Dynamic Properties     3  
Electrical Properties     3  
Elongation   2    
Flame Resistance   2    
Heat Resistance   2    
Impermeability   2    
Oil Resistance     3  
Ozone Resistance   2    
Tear Resistance     3  
Tensile Strength   2    
Water / Steam Resistance     3  
Weather Resistance 1      
*The chemical compatibility and physical properties are listed as general characteristics of the neoprene o-ring compound. Speciality compounds can be derived to enhance or modify the performance to meet o-ring's application needs.

Neoprene Compound » Compound Attributes

Chemical Description Chloroprene rubber
Abbreviations (ASTM 1418) CR
ISO / DIN CR
Other Trade Names Chloroprene
ASTM D2000 Designations BC, BE
Low Temperature Range -40°F / -40°C
High Temperature Range 250°F / 121°C
*The neoprene o-ring compound attributes are used to outline the basic properties. Neoprene o-ring attributes can be adjusted by modifying the basic compound.

Custom Neoprene O-Rings

Neoprene O-rings can be made in custom sizes to fit any application specific needs. Our engineering staff can review your application and design a solution that satisfies those requirements. You can find assistance with o-ring gland design here. You can find assistance with o-ring design here. To request a quote on your o-ring specifications please submit a RFQ here.

Standard AS568 Neoprene O-Rings

All stocked neoprene AS568 o-rings have three measurement types. First, a nominal inch reference, then actual inch sizes, and finally the metric size displayed in millimeters. Neoprene o-rings are stocked and cataloged by their AS568 number. This number references the Aerospace Standard 568 (AS 568) which was published by the SAE (Society of Automotive Engineers). Each o-ring is assigned a dash number which correlates directly to an exact o-ring size. You may view a complete chart of these o-ring sizes here.

Standard Metric Neoprene O-Rings

Neoprene O-rings are available in several metric sizes. Neoprene metric O-rings are cataloged by their cross section and inside diameter. Columbia references the metric neoprene o-rings by the compound number and the cross section along with the inside diameter. You may view a complete chart of the metric o-ring sizes here.
O-ring Measurement Chart
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