Profile Roofing Sheet

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.