Full definition
Two primary elastomer compounds used for belt bodies. Neoprene (CR): resistant to mineral oils, greases, and temperatures up to 90-100°C; flame retardant; traditional compound since the 1950s. EPDM: superior resistance to ozone, UV, weathering, and hot water/steam; longer service life by 20-40% in clean environments; operating range -40 to +130°C. Most modern belt manufacturers (Gates, Continental, Optibelt) have shifted to EPDM for standard drives. Neoprene remains mandatory in oily environments such as metalworking, automotive engine bays, and food processing with fats per ISO 1813.