There are many PPGI coated coils with different coatings, colors, and coating thickness. You can choose according to your requirements, for example, the use environment, design life, etc.

Coating Types

When choosing a primer, you need to consider the adhesion of the primer; while for top coating, corrosion resistance and color retention will be more important.

There are four commonly-used coatings, including polyester (PE), silicone modified polyester (SMP), high durability polyester (HDP), and polyvinylidene fluoride (PVDF). PE coating is of good adhesion, which is widely used as a primer. While HDP and PVDF will be more suitable as a top coating because of their excellent durability and color retention.

Coating primer	Top paint coating	Service life(years)
1) Epoxy primer, good adhesion, water resistance, alkali resistance, chemical corrosion resistance, poor single toughness. 2) Polyester primer, good adhesion, good flexibility, sensitive to humid environment, chemical resistance is not as good as epoxy primer. 3) Acrylic primer, good adhesion, good toughness and high pretreatment requirements. 4) polyurethane primer, chemical resistance, abrasion resistance, durability, toughness	1) Polyester resin, good adhesion, molding and outdoor durability.	8-10
2) Silicon Modified Polyester (SMP)	10-15
3) High weather resistant polyester (HDP)	12-15
4) Polyvinyl fluoride (PVC)	12-15
5) Polyvinylidene fluoride/fluorocarbon (PVDF) It has good formability and color retention, good outdoor durability and powder resistance, solvent resistance, limited color and high price.	12-20

PRE-PAINTED GALVANIZED STEEL COIL / SHEET

Base Metal: ASTM A653, CQ, G-40/60/80 Up to Structure Grade PPGI

Top: 5 Mic Epoxy Primer plus 20 Mic of Regular Polyester
Including 50 Mic of Protection Film (Option)
Bottom: 5 Mic Epoxy Primer (Grey Service Color, for Adhesive Properties)

relatively thick