The characteristics shown below are for the normal, or usual, range of these specific Elastomers. Characteristics can be changed somewhat, through different compounding, to meet the requirements of specialised applications. Each elastomer has a unique combination of strengths and weaknesses. Depending on each specific application, the elastomer must possess the correct combination of properties if it is to perform satisfactorily.
Tube and cover elastomers may occasionally be upgraded to take advantage of improved materials and technology.
| COMMON NAME Chemical Name |
NEOPRENE Poly- Chloroprene |
NITRILE Acrylonitrile & Butadiene |
HYPALON™ Chlorosulfonated Polyethylene |
EPDM Ethylene Propylene Diene |
CPE Chlorinated Polyethylene |
POLYESTER Polyamide Resin |
TEFLON™ Fluorinated Thermoplastic |
| Common Designation |
CR | NBR | CSM | EPDM | CPE | PE-E | PTFE |
| Flame Resistance |
Very Good | Poor | Good | Poor | Good | Poor | Good |
| Petroleum Base Oils |
Good | Excellent | Very Good | Poor | Very Good | Very Good | Excellent |
| Diesel Fuel | Fair to Excellent |
Excellent | Good | Poor | Very Good | Very Good | Excellent |
| Resistance to Gas Permeation |
Good | Good | Good to Excellent |
Fair to Good | Good | Good | Good to Excellent |
| Weather | Good to Excellent |
Fair to Good | Very Good | Excellent | Good | Excellent | Excellent |
| Ozone | Good to Excellent |
Poor for Tube Good for Cover |
Very Good | Excellent | Good | Good | Excellent |
| Heat | Good | Good | Very Good | Excellent | Excellent | Good | Excellent |
| Low Temperature | Fair to Good | Poor to Fair | Poor | Good to Excellent |
Good | Good | Excellent |
| Water – Oil Emulsions |
Excellent | Excellent | Good | Poor | Excellent | Very Good | Excellent |
| Water/Glycol Emulsions |
Excellent | Excellent | Excellent | Excellent | Excellent | Very Good | Excellent |
| Phosphate Esters to 82°C (180°F) |
Fair (For Cover) |
Poor | Excellent (not for Aerospace types) |
Very Good | Very Good | Good | Excellent |
| Phosphate Ester Base Emulsions |
Fair (For Cover) |
Poor | Excellent (not for Aerospace types) |
Very Good | Very Good | Good | Excellent |
HYPALON™, TEFLON™ DUPONT