Natural rubber sheet has high wear resistance, but also has the characteristics of delaying fire, self-extinguishing.Flame retardant grade reaches the highest V-0. Many rubber materials can be specially compounded to be fire-resistant. Silicone, EPDM, Neoprene, Natural Rubber & Nitrile can all be compounded with special F.R. (fire retardant) additives to make them fire-resistant.