0.40mm DX51D Z120 PE Prepainted Steel Coil RAL9002 for Roofing and Wall Cladding Applications 1.Product Overview 0.40mm DX51D Z120 PE Prepainted Steel Coil is a color-coated galvanized steel product designed for roofing sheets, wall cladding panels, steel structure buildings, industrial facilities, and general architectural applications. The product uses DX51D galvanized steel as the substrate with a Z120 zinc coating. A polyester paint system is applied to the galvanized