The surface of EPDM products will turn black when touched.

Low glue content. Because there is carbon black as reinforcement, carbon black and waste rubber powder will fall off when worn in use. Too much carbon black or filler! The glue content is too low! Increase the glue content and solve the problem immediately. EPDM is a copolymer of ethylene, propylene and a small amount of unconjugated diene, which is widely used in automobile parts, building waterproof materials, wire and cable sheaths, heat-resistant hoses, adhesive tapes, automobile seals and other fields.