Overview
Two-component inorganic zinc silicate primer based on ethyl silicate resin and zinc dust.​
It is described as providing excellent corrosion resistance with cathodic protection, strong chemical resistance, weathering and abrasion resistance, heat resistance, and suitability for on-line welding/cutting.​

Composition
Ethyl silicate resin, zinc dust, toughening agent, anti-settling agent, and solvent; supplied as Part A and Part B.​

Typical uses

• Long-term anti-corrosion primer for blast-cleaned steel; stated to withstand up to 400°C on properly prepared steel.​

• Typically used with epoxy coatings to achieve suitable corrosion protection (as stated).​

Technical data (typical)

• Appearance / color: Gray.​

• Theoretical consumption: 0.19 kg/m² at 50 µm DFT (losses not included).​

• Density / specific gravity: 1.6 kg/L.​

• Drying / curing (25°C, RH 70–85%): Touch dry 10 min; hard dry 2 h; cured 24 h.​

Application data (25°C)

• Mixing ratio (A:B): 28:7.​

• Induction time: No limit (as stated).​

• Pot life: 4 h (25°C).​

• Application methods: Airless spray, brush.​

• Thinner / Cleaner: X-11 inorganic zinc thinner; typical dilution 5–20%.​

• Recoat interval / overcoating interval (25°C, RH 70–85%): Minimum 24 h (longer at lower humidity); maximum not limited.​

• Recommended DFT: 50–75 µm per coat (brush: 40–50 µm per coat).​

Surface preparation

• Abrasive blasting to Sa 3 (not lower than Sa 2.5), or power-tool cleaning to St 3; surface profile 30–75 µm.​

System compatibility / packing / storage

• Compatible topcoats: epoxy intermediate coating, epoxy topcoat, polyurethane intermediate coating, polyurethane topcoat.​

• Shelf life: 6 months.​

• Storage: Store in a dry, cool, ventilated warehouse away from fire sources and direct sunlight; outdoor storage is not permitted.​

• Packaging: Part A 28 kg; Part B 7 kg.