PPGI PPGL Color Coated Steel Coil, HDP Prepainted Steel Sheet for Roof & Wall
PPGI PPGL Color Coated Steel Coil, HDP Prepainted Steel Sheet for Roof & Wall
PPGI & PPGL Steel Coil / Sheet
Prepainted galvanized and galvalume steel for roofing, wall cladding, sandwich panels and construction applications. Available in various thicknesses, RAL colors and coating options such as PE, SMP, HDP and PVDF.
EN 10204 3.1 MTC available. Factory supply with competitive pricing and flexible specifications.
Contact us for quotation and availability.
- Mill Test Certificate Provided
- Strict Quality Inspection
- Custom Sizes Available
- On-Time Global Delivery
Sky Steel Group manufactures and exports premium pre-painted and color coated steel sheets (PPGI & PPGL flat sheets and corrugated roofing panels) for industrial workshops, commercial roofing, agricultural storage silos, solar mounting enclosures, and architectural wall cladding. Built on high-grade hot-dip galvanized (GI, Z30–Z275) or Galvalume (GL, AZ30–AZ150) substrates with advanced coil coating chemistries (PE, SMP, HDP, and PVDF), our color coated sheets deliver exceptional UV resistance, anti-chalking performance, and flexible roll-forming durability in thicknesses from 0.12 mm to 1.5 mm. All products comply with ASTM A755, EN 10169, JIS G3312, and GB/T 12754.
Coating Chemistries, Flexibility & Architectural Performance
Each color coated steel sheet undergoes continuous multi-stage chemical pretreatment, primer application, and high-temperature bake curing. Our PVDF and HDP paint formulations incorporate ceramic inorganic pigments that block aggressive ultraviolet radiation, preventing color fading, chalking, and paint blistering even under extreme equatorial sunlight, desert heat, and coastal salt spray.
Thanks to tight resin cross-linking and precise substrate temper rolling, Sky Steel color coated sheets exhibit outstanding T-bend elongation (≤2T). This allows high-speed cold roll-forming into complex trapezoidal profiles, tight standing seams, and curved architectural eaves without paint flaking or micro-delamination along the fold lines.
Color Coated Steel Sheet (PPGI / PPGL) Specifications
| Item | Available Range |
|---|---|
| Product | Color Coated Steel Sheet / Pre-Painted Galvanized Sheet (PPGI / PPGL) |
| Substrate | Hot-Dip Galvanized (GI, Z30–Z275) / Hot-Dip Galvalume (GL, AZ30–AZ150) |
| Standard | ASTM A755 / EN 10169 / JIS G3312 / JIS G3322 / GB/T 12754 |
| Steel Grade | DX51D+Z/AZ, DX52D, DX53D / SGCC, SGLCC / S280GD, S350GD, S550GD (Full Hard) / ASTM A653 CS, SS Gr.50 |
| Thickness | 0.12 mm – 1.5 mm (Standard: 0.18 – 0.80 mm; Tolerance: ±0.01 mm) |
| Width | Flat: 600 – 1250 mm / Profiled: 680 – 1000 mm (Custom slitting and profiling available) |
| Length | 1000 mm – 12000 mm (Standard: 6ft, 8ft, 10ft, 12ft, 20ft / Custom cut ±1 mm) |
| Paint Chemistry | PE (Polyester) / SMP (Silicon Modified) / HDP (High Durability) / PVDF (Fluorocarbon) |
| Coating Thickness | Top: 15 – 25 µm (Primer 5 µm + Top 15–20 µm) / Back: 5 – 12 µm service coat |
| Color System | RAL Classic Chart / Custom Color Matching (Pantone / Physical Sample) / Matte & Wrinkle Finishes |
| Protective Film | Transparent / Printed PE Protective Film (30 – 50 µm thickness, easy peel-off) |
| Physical Properties | T-Bend: ≤2T / Pencil Hardness: ≥H / Impact: ≥9J / MEK Resistance: ≥100 double rubs |
| Application | Industrial Warehouse Roofs / Factory Wall Cladding / Solar Support Enclosures / Agricultural Silos / Modular Buildings |
| Inspection & Certificate | EN 10204 3.1 MTC / ISO 9001 / CE / SGS / BV Coating Thickness & Salt Spray Test Reports |
| Packaging | Waterproof Barrier Paper + Steel Cover Wrap + Corner Edge Guards + Steel Straps on Solid Wooden Pallets |
| Customization | Custom Profile Roll-Forming / Double-Sided Color Coating / Embossed Patterns / Special Anti-Static & Antibacterial Paint |
Need a Factory Price for Color Coated Steel Sheets?
Send us your required RAL color code, substrate type (GI / GL), sheet thickness, profile type or flat dimensions, and quantity for an immediate wholesale quote.
Where Are Color Coated Steel Sheets (PPGI / PPGL) Used?
Combining aesthetic architectural appeal with superior weatherproofing, color coated steel sheets provide long-term corrosion protection across industrial complexes, commercial logistics hubs, agricultural infrastructure, and clean-energy solar installations.
Industrial Roofing, Wall Cladding & Solar Support Enclosures
Engineered for factory roofs and industrial warehouse envelopes. High-strength trapezoidal color coated sheets (such as Sea Blue and Signal Orange) integrate seamlessly with rooftop photovoltaic mounting racks, flashing trims, and side wall claddings, offering rapid installation, thermal reflectivity, and leak-proof weather tightness.
Multi-Sector Infrastructure: Workshops, Warehouses, Silos & Cladding
Widely utilized across modern commercial and agricultural construction:
• Industrial Workshops: Large-span crane-hoisted blue wall panels for rapid steel structure assembly.
• Logistics & Solar Warehouses: Eco-friendly green and grey panels with rooftop solar carport integration.
• Agricultural Silos: Weather-sealed cream and yellow corrugated sheets for grain storage and chemical silos.
• Commercial Facilities: Bright orange and blue composite facades and sliding industrial doors.
Seaworthy Container Export Packing: Coils & Palletized Flat Sheets
Complete export-grade protection against surface scratching and marine humidity. Color coated coils are loaded using heavy-duty timber cradles with two-tier wooden structural framing inside 20GP containers, while pre-cut color coated flat sheets are strapped on fumigated wooden pallets with corner angle protectors, ensuring zero paint scuffing during ocean transit.
Frequently Asked Questions About PPGI PPGL Color Coated Steel Coil, HDP Prepainted Steel Sheet for Roof & Wall
1. What are the differences between PE, SMP, HDP, and PVDF paint coatings?
The choice depends on environmental UV intensity and expected service life:
• PE (Polyester): Standard commercial coating with good adhesion and flexibility. Outdoor service life of 10–12 years in standard temperate climates.
• SMP (Silicon Modified Polyester): Enhanced hardness and chalking resistance, delivering 12–15 years durability.
• HDP (High-Durability Polyester): Formulated with high-weatherability resins and inorganic pigments, offering 15–20 years warranty against color fading.
• PVDF (Fluorocarbon / Kynar 500): Premium fluoropolymer system providing 25–30+ years of maintenance-free performance under intense UV, acid rain, and heavy industrial/marine environments.
2. Should I choose PPGI (Galvanized) or PPGL (Galvalume) as the base substrate?
Both provide sacrificial cathodic protection with specific advantages:
• PPGI (Pre-Painted Galvanized): Uses pure zinc substrate (Z40–Z275). Excellent edge protection, highly cost-effective, and widely specified for interior wall panels, ductwork, and standard industrial roofing.
• PPGL (Pre-Painted Galvalume): Uses 55% Al-Zn alloy substrate (AZ30–AZ150). Provides 2–4 times greater barrier corrosion resistance and high heat reflectivity, making it the superior choice for severe coastal roofing, high-temperature industrial buildings, and tropical climates.
3. How do you ensure accurate RAL color matching and batch consistency?
We utilize computerized spectrophotometers (Datacolor) to measure color deviation (ΔE ≤ 0.8) against master RAL / Pantone color chips or customer-supplied physical metal swatches. Every production batch is tested under multiple illuminants (D65 / TL84) to eliminate metamerism and guarantee exact color uniformity across thousands of tons.
4. Will the paint crack or peel during corrugated roll-forming and bending?
No. Our color coated steel sheets undergo strict flexibility testing with T-Bend ratings of ≤2T (or 0T–1T upon request) and reverse impact resistance ≥9J. The flexible cross-linked primer and topcoat bond tenaciously to the substrate, preventing micro-cracking, flaking, or delamination even during high-speed cold roll-forming into sharp trapezoidal ribs or standing seam seams.
5. Which flat sheet sizes and roll-formed profiles are available?
We supply both raw flat sheets and finished roll-formed profiles:
• Flat Sheets: Standard widths 914 mm, 1000 mm, 1200 mm, 1219 mm, 1250 mm with precision cut-to-length (1.0 m – 12.0 m, tolerance ±1 mm).
• Roll-Formed Profiles: Trapezoidal / IBR (e.g., YX25-205-820, YX35-125-750), Corrugated Sinusoidal Waves (YX18-76-836), and architectural Standing Seam panels.
6. How are color coated steel sheets protected and packaged for ocean export?
To prevent paint surface abrasion and sea salt humidity damage:
• A transparent or printed protective PE film (30–50 µm) can be applied to the top surface.
• Flat sheets are bundled on heavy fumigated wooden pallets (1.0–2.5 MT/bundle), fully wrapped with waterproof kraft paper and galvanized steel protective jackets, protected by metal corner guards, and strapped tightly with high-tensile steel bands.
• In container loading, pallets are braced with solid wooden dunnage to prevent sliding or impact.
