Product Introduction

PPGL (Pre-Painted Galvalume Steel) Sheet is a high-performance composite material combining a galvalume-coated steel substrate with organic coatings. The galvalume layer, consisting of 55% aluminum, 43.4% zinc, and 1.6% silicon, provides exceptional corrosion resistance, outperforming traditional galvanized steel by 2-6 times in harsh environments. This alloy forms a protective oxide-aluminum barrier and utilizes zinc’s sacrificial anode effect to extend the material’s lifespan.

The organic coating, available in PVDF, HDP, or polyester variants, enhances weather durability, UV resistance, and color retention. PPGL sheets support customizable colors (RAL standard), textures (woodgrain, stone, metallic finishes), and gloss levels, catering to architectural, industrial, and decorative needs.

Applications span roofing and cladding for industrial buildings, warehouses, and commercial complexes, where their lightweight design, low maintenance, and 25-year lifespan reduce lifecycle costs. They are also used in appliances (refrigerators, washing machines), transportation (vehicle bodies, containers), and infrastructure (advertising boards, noise barriers). Eco-friendly production with recyclable substrates and low VOC emissions aligns with sustainable construction trends.

Surface Treatmet

Laminated Film
The process is to coat a transparent organic film (30-50 µm) on the steel coil at high temperature. It has some unique properties, such as fire resistance, fingerprint resistance, excellent durability, anti-fouling ability, etc. Obviously, this treatment method can protect the steel coil well during storage and transportation.
Embossing
Embossed PPGI steel coil design has different patterns. Popular patterns are stucco, rhombus, etc. And it's customizable. Compared with the smooth steel coil, it has a vivid 3D effect.

Coating Type

In the coil coating, the durability of the role is the resin and pigment, the most commonly used finish polyester, silicon modified polyester, high durability polyester and polyvinylidene fluoride.
Polyester PE
Good adhesion, rich color, wide range in formability and outdoor durability, medium chemical resistance, low cost.
Silicon Modified Polyester SMP
The hardness, abrasion resistance and heat resistance of the coating film are good; as well as good external durability and powder resistance, gloss retention, general flexibility and medium cost.
High Durability Polyester HDP
Excellent color retention and UV resistance, excellent outdoor durability and chalking resistance, good film adhesion, rich color, excellent cost performance.
Polyvinylidene Fluoride PVDF
Excellent color retention and UV resistance, excellent outdoor durability and chalking resistance, excellent solvent resistance, good formability, dirt resistance, limited color, and high cost.

About Us

Zhongxi Metal is a professional manufacturer engaged in the research, development, production, sale and service.,  is committed to providing one-stop steel procurement services for global client. 

Advantages of PPGL Sheet

1. Superior Corrosion Resistance

PPGL Sheet combines a galvalume (Al-Zn alloy) substrate with organic coatings, offering 2-6 times higher corrosion resistance than galvanized steel. The alloy’s aluminum forms a dense oxide layer to block moisture, while zinc acts as a sacrificial anode, preventing rust even in coastal or industrial environments. For example, PPGL with AZ150 coating lasts 25+ years in marine conditions, outlasting standard GI sheets.

2. Exceptional Weather Durability

Its organic coatings (e.g., PVDF, HDP) resist UV degradation, humidity, and temperature extremes. PVDF-coated PPGL maintains color fastness (ΔE ≤ 3) and gloss retention (>80%) for 15+ years in sunlight, while HDP variants withstand industrial pollutants without chalking or fading. This makes it ideal for rooftops exposed to harsh climates.

3. Aesthetic Customization Flexibility

PPGL supports RAL color matching and textures like woodgrain, stone, or metallic finishes. Advanced 3D printing technology can replicate 0.2mm-deep patterns, enabling architects to achieve brick-like facades or marble-like textures. This eliminates the need for secondary painting, reducing costs and installation time.

4. High Formability and Workability

With thicknesses from 0.12mm to 6.00mm and widths up to 1,500mm, PPGL suits deep drawing, bending, and stamping. Its coating adhesion (Class 1 per GB/T 9286) prevents cracking during processing, making it suitable for complex automotive parts, electrical cabinets, or HVAC ducts without post-treatment.

5. Cost-Effectiveness Over Lifecycle

Though 15–20% pricier than GI sheets initially, PPGL’s 25-year lifespan and low maintenance (no repainting) cut total costs by 30%. For a 10,000m² warehouse roof, PPGL reduces lifecycle expenses by $2/m² vs. traditional materials, offering rapid ROI.

We have our own Physical & Chemical Testing Center Lab to guarantee our product quality. Our test items & instrument fully meet international standards.

Applications of PPGL Sheet

1. Architectural Excellence in Construction

PPGL Sheet is widely used in roofing, cladding, and structural components for industrial buildings, warehouses, and commercial complexes. Its lightweight design simplifies installation, while customizable colors and textures (e.g., woodgrain, metallic finishes) enhance architectural aesthetics. With a lifespan of 25+ years in harsh climates, it reduces maintenance costs by 30% compared to traditional materials, making it ideal for sustainable, cost-effective construction.

2. Durability for Home Appliances

In the appliance industry, PPGL Sheet serves as a corrosion-resistant, scratch-proof material for refrigerators, washing machines, and HVAC systems. Its formability allows complex shapes without coating cracks, ensuring long-term performance. For example, a PPGL-coated refrigerator door retains its finish for 15+ years, even in high-humidity kitchens, while eliminating the need for repainting.

3. Lightweight Strength for Transportation

PPGL Sheet is a preferred material for vehicle bodies, containers, and trailers due to its high strength-to-weight ratio. It reduces fuel consumption by 10–15% compared to heavier metals while resisting corrosion from road salt and moisture. A 0.5mm PPGL truck body lasts 12+ years without rust, outperforming aluminum in durability.

4. Resilience in Infrastructure

For public infrastructure like bridges, noise barriers, and utility cabinets, PPGL Sheet withstands pollution, UV exposure, and extreme temperatures. Its anti-graffiti coatings simplify cleaning, while 25-year warranties ensure low lifecycle costs. Municipalities adopt PPGL for projects like bus shelters, combining aesthetics with resistance to vandalism and weathering.

Contact Us

As a leading company, Zhongxi Metal is known for our excellent product quality and professional services, providing our customers with a reliable partner. We have a global sales network that can meet the needs of customers in different countries and regions.If you need more information about us or have any other needs, please feel free to contact us. We look forward to working with you to create a better future.