TATA Metal Roofing Sheet Dealers in Vapi

Specifications : – exterior painting of pre painted sheets consists of • base metal – steel • metallic coating of either zinc or aluminum zinc coating for corrosion resistance • chromate coating for good adhesion purpose • primer coating for good undercut corrosion resistance, good adhesion & smoothness to topcoat finish • top finish coat to provide color, pleasing appearance – interior painting of pre – painted sheet consists of • base metal • metallic coating • top finish coat • important criteria for selecting pre painted sheet is based on base coat – gi base (galvanized base – zn) specialty of zinc • zinc having self physical property called cathodic reaction – gl base (galvalume base – alzn) specialty of al- zn raw material used :- – base metal : high tensile cold rolled steel.