Authentic Steel offers long-lasting prepainted steel coil options engineered for high-end industrial cladding, insulated sandwich panels, and modern architecture. Featuring advanced multi-layer coating systems (PE, SMP, HDP, PVDF) on premium GI, GL, or ZAM steel substrates, our prepainted coils combine vivid color retention, reliable UV protection, and excellent structural formability.
Factory-Direct Prepainted Steel Coils (PPGI & PPGL) with Custom RAL Colors
Custom Color-Coated Steel Coil (PPGI & PPGL) Engineered for Architectural & Industrial Durability
Authentic Steel provides precision-engineered prepainted steel coils (PPGI and PPGL) tailored specifically for global distributors, roofing sheet manufacturers, and home appliance fabricators. Unlike standard galvanized metals, our color-coated coils undergo a specialized multi-stage chemical pretreatment, primer application, and high-temperature oven curing process. This multi-layer defense system merges the structural strength of carbon steel with high-performance organic paint coatings, delivering vibrant color aesthetics and superior resistance against UV radiation, chalking, and industrial chemical exposure.
Substrate Selection: PPGI vs. PPGL Coil Performance
To match diverse regional climate demands and budget requirements, we manufacture two primary prepainted substrate variations:
Prepainted Galvanized Steel Coils (PPGI): Formed using hot-dipped zinc-coated steel sheets as the metallic base. PPGI offers exceptional paint adhesion, flexibility for roll-forming into corrugated profiles, and cost-effective corrosion protection for inland residential and commercial buildings.
Prepainted Galvalume Steel Coils (PPGL): Built upon a 55% Aluminum-Zinc alloy substrate. PPGL delivers up to three to five times higher heat reflectivity and atmospheric corrosion resistance compared to PPGI, making it the preferred choice for harsh coastal environments, chemical processing plants, and premium roofing projects.
| Parameter Item | Technical Specifications & Range |
| Product Name | Prepainted Steel Coil (PPGI / PPGL / Poly-Coated ZAM) |
| Core Substrates | Hot-Dip Galvanized, Galvalume, Zinc-Aluminum-Magnesium (ZAM) |
| Thickness Spectrum | 0.085mm - 1.4mm |
| Width Spectrum | 900mm - 1250mm (Custom slits available) |
| Top Paint Coating | 5um - 35um (Multi-coat systems) |
| Reverse Paint Coating | 5um - 20um (Moisture resistant backer paint) |
| Paint Chemistries | Regular Polyester (PE), HDP, PVDF Fluorocarbon |
| Visual Textures | Solid RAL Glossy, Textured Matte, Pattern Printed Plate |
| Protective Film | Optional PE protection film (Thickness: 30um - 50um) |
| Core ID Size | 508mm / 610mm |
| Permissible Coil Mass | 3 MT - 24 MT |
Advanced Paint Systems & Custom Coating Options
Our production lines utilize top-tier international paint formulations to guarantee strict color consistency and longevity:
Polyester (PE): Ideal for general exterior roofing, wall cladding, and interior partition panels with high cost-efficiency.
High-Durable Polyester (HDP): Formulated with advanced resin matrices for superior UV resistance and gloss retention in sunny, tropical climates.
Silicon Modified Polyester (SMP): Engineered for enhanced hardness and abrasion resistance in industrial environments.
Polyvinylidene Fluoride (PVDF): The ultimate architectural coating offering maximum fade resistance, chemical immunity, and a 20+ year outdoor service life.
Tailored Specifications & Pattern Customization
We offer comprehensive OEM/ODM customization options across our production facility near Tianjin Port. Clients can select from the full RAL Color System (such as RAL 9002, RAL 9006, RAL 5012, and RAL 3005) or request custom 3D printed patterns, including wood grain, brick textures, camouflage, and matte/embossed finishes. Additional protective options, such as PE protective films and Anti-Static / Anti-Bacterial coatings for cold room panels, are readily integrated upon request.
Factory Capacity & Rigorous Quality Verification
Backed by an annual processing capacity of 2.6 million metric tons, Authentic Steel maintains strict quality control compliant with JIS G3312, ASTM A755, and EN 10169 standards. Every production lot undergoes rigorous laboratory testing for paint film thickness, MEK solvent rub resistance, T-bend flexibility (0T–2T), pencil hardness (≥2H), and 1,000-hour salt spray endurance. Contact our international business development team today to receive mill test certificates, free color swatch samples, and factory-direct wholesale pricing.
Company Name: Authentic Steel (Winroad Group Export Department)
Email: bella@authsteel.com / bella@wanlusteel.com
Mobile/Tel/Whatsapp: +86 189 2041 0870
