W61-500 Silicone High-Temperature Primer

Overview
Two-component silicone high-temperature primer for long-term service at 500°C.​

Composition
Alkyl silicate, silicone resin, functional pigments, heat-resistant pigments, anti-corrosion additives, auxiliaries, curing agent; supplied as Part A & Part B.​

Typical uses
For high-temperature equipment requiring 400–500°C resistance for protection and decoration.​

Technical data (typical)

• Appearance: iron red, grey, black.​

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

• Density: 1.4 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): 25:0.5.​

• Induction time: none.​

• Pot life: 4 h.​

• Application methods: airless spray, brush, roller.​

• Thinner: W61 dedicated thinner, 5–10%.​

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

• Recommended DFT per coat: 20–30 µm (brush 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: W61-500 silicone high-temperature primer + W61-500 silicone aluminium pigmented high-temperature topcoat.​

• Packing: Part A 25 kg; Part B 0.5 kg.​

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

• Shelf life: 6 months.