15–20 Micron Polyester + 5 Micron Primer LFQ AZ Prepainted Color Steel Coils

15–20 Micron Polyester + 5 Micron Primer LFQ AZ Prepainted Color Steel Coils

1．Product Overview

AZ prepainted color steel coils are designed for roofing sheets, wall cladding systems, industrial buildings, and architectural applications requiring stable coating adhesion and long-term corrosion resistance.

The product combines galvalume steel substrate with multi-layer organic coating systems to improve weather resistance, coating durability, and surface appearance consistency for exterior construction environments.

The LFQ surface quality supports roll forming, bending, and profiling operations commonly used in roofing and wall panel manufacturing.

2．Technical Solution

The substrate uses hot dipped galvalume steel with AZ50–AZ180 coating to improve corrosion resistance under outdoor exposure conditions.

The coating structure consists of polyester top coating combined with primer layers to improve adhesion and coating durability.

Available paint systems include PE, SMP, and PVDF according to project exposure requirements.

The coating structure supports stable forming performance while maintaining coating flexibility during roll forming and fabrication processes.

3．Specifications

4．Application

The product is suitable for roofing sheets, wall cladding panels, steel structure workshops, warehouses, prefabricated buildings, airport facilities, industrial buildings, and exterior architectural systems.

It is also widely used for corrugated roofing sheet production, sandwich panels, decorative wall systems, and building envelope applications.

5．Processing

• The coils are suitable for roll forming, bending, profiling, slitting, and cut-to-length processing.
• LFQ quality supports forming operations requiring stable coating flexibility and reduced surface cracking risk during fabrication.
• Protective film can be supplied on the top surface to reduce handling scratches during transportation and installation.

6．Advantages

• The galvalume substrate provides improved corrosion resistance compared with conventional galvanized substrate in outdoor environments.
• AZ50–AZ180 coating supports stable performance under humid and industrial exposure conditions.
• The multi-layer polyester and primer coating structure improves adhesion consistency and coating durability.
• The 700–1250mm width range supports mainstream roofing and cladding production lines.
• Customized RAL colors support architectural appearance matching requirements.
• PE, SMP, and PVDF paint systems are available for different weather resistance requirements.

7．How to Choose

• Choose PE coating for general roofing and wall cladding applications.
• Choose SMP coating for improved weather resistance and outdoor durability.
• Choose PVDF coating for projects requiring stronger UV resistance and long-term color retention.
• Select AZ coating level according to environmental exposure conditions and expected service life requirements.
• Confirm color, gloss, coating system, protective film, and fabrication requirements before production.

8．FAQ

Q1．What is the substrate type for this product
The product uses hot dipped galvalume steel substrate.

Q2．What AZ coating range is available
Available AZ coating range is AZ50–AZ180.

Q3．Can customized RAL colors be supplied
Yes. Customized RAL colors can be produced according to project requirements.

Q4．Is the material suitable for roofing sheet roll forming
Yes. LFQ quality supports roofing sheet and wall cladding roll forming applications.

Q5．What paint systems are available
PE, SMP, and PVDF coating systems are available depending on outdoor exposure requirements.