ASTM D2000 CH
SAE J 200 Codes
Relative Cost Medium
-40°~125°C Special Compound -40°~135°C
-40°~257°F Special Compound -40°~257°F
Automotive: Fuel pump diaphragms, hoses, motor mounts, boots, seals
General industrial use
Medical: Oxygen mask hoses
Performs Well in…
Mineral oil and grease
Silicone oil and grease
Ozone and weathering
Doesn’t Perform Well in…
Ketones and esters
Aromatic and chlorinated hydrocarbon
Epichlorohydrin is available in three types: the homopolymer (CO), the copolymer (ECO), and the terpolymer (GECO). Epichlorohydrin compounds are noted for their superior gas impermeability and physical properties over a wide temperature range while maintaining excellent resistance to petroleum oils. It is a good replacement to IIR when not only gas impermeability but also oil resistance is needed. It is also used in the petroleum industry where a little higher temperature capability than NBR is required.
Resistant to ozone, weathering and oils
Good heat resistance
Very low permeability to gas
Compounds from this polymer can exhibit a corrosive nature and can be difficult to process in manufacturing.
Compression set is only “fair” at elevated temperatures (120° to 135°C, 250° to 275°F).