Z60–Z275 Prepainted Galvanized Steel Coil 0.12–1.20mm for Roofing and Building Panels

1．Product Overview

Prepainted galvanized steel coil is designed for roofing sheets, wall cladding, building panels, and home appliance parts that require both corrosion protection and a finished color surface.

The product combines a hot dipped galvanized steel substrate with an organic paint coating system. The zinc layer provides base metal protection, while the painted surface improves appearance consistency, weatherability, and suitability for visible exterior and interior applications.

2．Technical Solution

The coil uses a galvanized steel substrate with a controlled zinc coating range of 20–275g/m². The surface coating system includes primer and finish paint to support adhesion, appearance stability, and long-term performance during forming and installation.

The top surface uses 10–20 micron polyester plus 5 micron primer. The back surface uses 5–7 micron, or 7–8 micron polyester plus 5 micron primer. Available paint systems include polyester, SMP, and PVDF, allowing different selections for standard use, stronger weather resistance, or longer exterior exposure.

3．Specifications

4．Application

Prepainted galvanized steel coil is suitable for roofing sheets, wall cladding, steel structure workshops, warehouses, airport buildings, storage buildings, home appliance panels, and light construction panels.

It is commonly used where the finished product requires a clean painted surface, stable forming performance, and reliable substrate protection.

5．Processing

• The coil can be supplied for cut-to-length sheet production.
• It can be slit into narrower widths for roofing sheet and wall panel production.
• It is suitable for roll forming, bending, profiling, and general sheet fabrication.
• Protective film can be applied on the top side when required for surface protection during processing, transportation, and installation.

6．Advantages

• The galvanized substrate provides 20–275g/m² zinc coating for base corrosion protection.
• The 0.12–1.20mm thickness range covers common roofing and panel fabrication needs.
• The 700–1250mm width range matches mainstream roll-forming and cladding production lines.
• Polyester, SMP, and PVDF paint systems support different weather exposure requirements.
• The defined top and back coating structure helps maintain stable surface quality.
• Coil ID 508mm / 610mm and max. 13 MT coil weight are suitable for standard processing equipment.

7．How to Choose

• Choose polyester for standard roofing, wall cladding, and general building panels.
• Choose SMP when better weather resistance is required.
• Choose PVDF for higher UV exposure and longer outdoor service requirements.
• Choose higher zinc coating levels for humid or more exposed environments.
• Choose thicker material when higher panel rigidity is required.
• Confirm color, gloss, protective film, coil ID, and final processing method before production.

8．FAQ

Q1．What is this product used for
It is used for roofing sheets, wall panels, home appliance panels, and general building sheet applications.

Q2．What is the available thickness range
The available thickness range is 0.12–1.20mm.

Q3．What paint systems are available
Polyester, SMP, and PVDF are available.

Q4．Can customized colors be supplied
Yes. Colors can be supplied according to RAL Card or client request.

Q5．Can protective film be added
Yes. The coil can be supplied with or without protective film on the top side.