W61-250/300 Silicone High-Temperature Anti-Corrosion Coating

Overview
Two-component silicone high-temperature anti-corrosion coating system supplied as primer and topcoat.​

Composition
Alkyl silicate, silicone resin, functional pigments, heat-resistant pigments, anti-corrosion additives, curing agent; supplied as primer and topcoat.​

Typical uses
High-temperature protection and marking coating for steel chimneys and other steel structures.​

Technical data (typical)

• Appearance: primer grey or iron red; topcoat white, silver white, black, green, etc.​

• Theoretical consumption: primer 0.11 kg/m² at 30 µm DFT (loss not included).​

• Theoretical consumption: topcoat 0.12 kg/m² at 30 µm DFT (loss not included).​

• Density: primer 1.4 kg/L; topcoat 1.2 kg/L.​

• Drying time (25°C): surface dry 1 h; hard dry 24 h; full cure 7 d.​

Application data (25°C)

• Mixing ratio (A:B): primer 25:0.5.​

• Mixing ratio (A:B): topcoat 20:0.4.​

• Induction time: none.​

• Pot life: 6 h.​

• Application methods: airless spray, brush.​

• Thinner: W61 dedicated thinner, 5–9%.​

• Recoat interval: min 24 h; max unlimited.​

• Recommended DFT per coat: 20–30 µm.​

Surface preparation
Steel: blast to Sa 2.5 or power-tool clean to St 3; surface profile 30–75 µm.​

System compatibility / packing / storage

• System compatibility: W61-250/300 silicone high-temperature anti-corrosion primer + topcoat.​

• Packing: primer Part A 25 kg, Part B 0.5 kg; topcoat Part A 20 kg, Part B 0.4 kg.​

• Storage: dry, cool, ventilated; away from fire; avoid strong sunlight; no outdoor storage.​

• Shelf life: 6 months.