20×40 Silver Fire Retardant Tarp. All our Fire Retardant Tarps are NFPA 701, CPAI-84 & California Title Compliant and registered as a Flame Resistant Product and have the California State Marshal Tag sewn to the side of the tarp. 14×14 mesh count, 6 Oz per Sq. Yard, 12 Mil Thickness, 3 Ply Material, Grommets every 18 inches, UV protected both sides, 1200 Denier, Reinforced Corners, Rope Reinforced Edges, Waterproof, Rot Proof, Mildew Resistant, Tear Resistant, Arctic Flexibility, Acid Resistant. Please note: All Fire Retardant Poly Tarps are Approximately 4″ to 6″ shorter by length and width from the stated cut size. Other 20×40 Tarps.