# SYNTHETIC ZINC PRIMER (1-PACK) RAINBOW PAINTS ## Product Code No.912 (SP-07) ## Type Single-component high-performance anti-rust primer refined from synthetic resin and high-quality zinc powder. ## Application Long-term anti-corrosion primer for steel structures such as storage tanks, bridges and steel frames; also used as prefabricated steel plate shop primer. ## Properties 1. Fast drying, excellent adhesion 2. Single-pack paint, no pot life limitation and no mixing hassle 3. Outstanding mechanical abrasion resistance 4. Slight charring during cutting or welding of pre-coated substrates 5. Powerful anti-rust performance, can serve as maintenance primer 6. The coated film will not rust after half-year atmospheric exposure ## Specification Data - Gloss: Flat - Color: Grey - Specific Gravity: ≥2.25 kg/L - Viscosity: 80~100 KU (25°C) - Drying Time - Surface dry: Within 10 mins - Hard dry: Within 4 hours (25°C) - Film Thickness: Wet film 45~170 μm, Dry film 10~20 μm - Theoretical Coverage: 22.2 ㎡/L, 10.0 ㎡/kg (@20μm dry film) - Recoating Interval: Minimum 4 hours - Volume Solids: 44% - Heat Resistance - Continuous: 93°C - Intermittent: 121°C - Thinner: Special Thinner for 1-Pack Zinc Primer & No.1005 Rainbow Thinner - Thinner Dosage: 0~15% (excluding tool cleaning; approx. 30% for shop primer application) - Compatible Topcoats: Rainbow full range of topcoats, polyurethane anti-rust finish, chlorinated rubber coatings - Storage Stability: Minimum 2 years under normal storage ## Application Methods Brush Coating, Airless Spray, Roller Coating ## Construction Precautions ⚠️ 1. Zinc powder has high specific gravity and tends to settle; stir thoroughly before use. Dilute with thinner within specified dosage if paint is too thick. 2. Fully remove moisture, grease, dust, rust and corrosive salts from substrate surfaces to ensure full protective performance. 3. Avoid construction when surface dew exists, raining or relative humidity exceeds 85%RH. ## Note All data provided in this product datasheet are derived from internal laboratory test data for construction design reference only. Actual performance varies subject to different construction environments. This document does not constitute any legally binding warranty or statement from the manufacturer. Contact our technical department for clarification of any uncertainties.