Heat-Reflective / Insulating Prepainted Galvalume Steel (PPGL) – ATTSU-9 Coating Reduces Roof Heat Absorption for Grain Silos & Cold Storage
Product Overview
This advanced Prepainted Galvalume Steel (PPGL) features a special ATTSU-9 heat-insulating topcoat that reflects a high percentage of solar infrared radiation. Unlike standard roofing materials that absorb heat, this coating actively reflects sunlight, reducing the roof surface temperature by 15–20°C compared to conventional steel roofs. This dramatic temperature reduction translates directly into lower interior cooling costs, improved worker comfort, and better preservation of temperature-sensitive goods. The base material is 55% Al-Zn coated steel (galvalume), providing excellent corrosion resistance and heat reflectivity even before painting.
Key Specifications
| Parameter | Range / Options |
|---|---|
| Substrate | Galvalume steel (55% Al-Zn) – AZ50 to AZ150 |
| Thickness (BMT) | 0.3 – 1.2 mm |
| Width | 1000 / 1200 / 1219 / 1250 mm |
| Topcoat System | ATTSU-9 thermal-insulating paint + primer |
| Heat Reflectance | Up to 95% infrared reflectance; ~80% visible light reflectance |
| Temperature Reduction | 15–20°C lower than standard PE-coated steel under identical sunlight |
| Color | White, light grey, or other reflective RAL shades |
Core Advantages
Energy Savings – Significant reduction in air conditioning load during summer months.
Protects Stored Goods – Maintains stable internal temperatures for grain, pharmaceuticals, or cold chain products.
Extended Roof Lifespan – Lower thermal cycling reduces expansion/contraction stress on the substrate and fasteners.
Eco-Friendly – Reduces urban heat island effect and carbon footprint of buildings.
Applications
Agricultural storage: Grain silos, rice mills, cold storage warehouses.
Industrial buildings: Factories with high internal heat generation (e.g., foundries, textile mills).
Commercial roofs: Shopping malls, distribution centers.
Livestock housing: Poultry farms and piggeries where temperature control improves animal welfare.