Full definition
Polychloroprene (CR) compounds specifically formulated for automotive under-hood and chassis applications requiring simultaneous resistance to engine oils, ozone, moderate heat, and dynamic flexing. Temperature range: -30 to +100°C continuous (+120°C intermittent). Typical applications: engine mount bushings (vibration isolation + oil resistance), CV joint boots (flex fatigue + grease resistance), coolant hoses (antifreeze compatibility), spark plug boots, body mount bushings, suspension dust boots, and door/window weatherstrip (when oil resistance is needed in addition to weather resistance). Automotive neoprene compounds are formulated with: GN-grade polymers (crystallization-resistant for cold flexibility), medium-high carbon black loading (abrasion resistance), and antiozonant protection for exterior parts. Testing per SAE J200 and OEM specifications. Competes with EPDM (better at heat/weathering but no oil resistance) and NBR (better oil resistance but no ozone resistance). The combination of oil + ozone + dynamic flex resistance makes CR uniquely suited for certain automotive applications. OEM and aftermarket brands: NOK, Freudenberg, Continental, Hutchinson.