Nippon Paint 1K Etching Primer is a high-performance, single-pack polyvinyl butyral-based primer designed specifically for non-ferrous metal substrates. Unlike standard primers, this 1K (one-component) solution contains specialized phosphoric acid etching agents that chemically "bite" into smooth surfaces, ensuring an unbreakable bond between the metal and subsequent paint layers.
It is the industry-standard solution for difficult-to-paint surfaces such as galvanized iron, aluminum, stainless steel, and alloys. With its fast-drying properties and excellent corrosion resistance, it provides a stable foundation that prevents paint peeling and flaking in both interior and exterior environments.
Product Type: Single-pack Polyvinyl Butyral (PVB) Etching Primer.
Color: Yellowish Green (Translucent).
Specific Gravity: 0.90 – 1.00 kg/litre.
Solid Content: Approximately 15% by volume.
Drying Time (at 30°C):
Touch Dry: 5 – 10 minutes.
Hard Dry: 30 minutes.
Theoretical Coverage: 10 – 12 m² per litre (at 10–15 microns Dry Film Thickness).
Overcoating Interval: Minimum 1 hour; Maximum 24 hours (for optimum adhesion).
Preparation & Mixing: Stir the primer thoroughly before use. This is a 1K product, so no hardener is required, making it convenient for quick applications.
Application Methods:
Spray (Recommended): Use a conventional air spray with 10–20% thinning for a smooth, uniform coat.
Brush/Roller: Apply a thin, even layer. Avoid over-brushing, as this primer dries very quickly.
Thinning: Use Nippon Vinilex 120 Active Primer Thinner or a high-quality NC Thinner. Do not over-thin, as a thin film (10–15 microns) is essential for the "etching" process to work effectively.
For Non-Ferrous Metals (Aluminium/Galvanised/Stainless Steel):
Primer: 1 coat of Nippon 1K Etching Primer (Dry film thickness: 10–15μm).
Undercoat: 1 coat of Nippon 2K PU Undercoat or Nippon EA9 Finish HB.
Topcoat: 2 coats of Nippon 9000 Gloss Finish or Nippon PU Recoatable Finish.
For Automotive/Repair Touch-ups:
Degreasing: Clean the surface thoroughly with a solvent degreaser or Nippon Paint Thinner to remove all traces of oil, grease, and wax. This is the most critical step for non-ferrous metals.
Oxidation Removal: For weathered aluminum or galvanized steel, remove white rust or oxidation using a nylon abrasive pad or fine sandpaper (P400-P600).
Dryness: Ensure the surface is 100% dry. Even trace amounts of moisture can interfere with the chemical etching process.
Sanding (New Metal): For very smooth stainless steel or alloys, a light scuff-sanding with fine-grit sandpaper helps improve mechanical bonding.
Dust Removal: Use a tack cloth or compressed air to ensure no dust or lint remains on the substrate before spraying.
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