- Refineries.
- Mines.
- Exterior Storage tanks.
1. Substrate Condition
- The surface must be clean, dry, and free of all contaminants such as:
- Oil, grease, dirt, dust, salts, and previous coating failures.
- Suitable substrates include:
- Properly prepared steel, aluminum, galvanized metal, and previously coated surfaces.
2. Preparation of New Steel
- Abrasive blast clean to a minimum standard of ISO 8501-1 Sa 2½ (Near White Metal).
- Ensure a surface profile of 40–75 microns for optimum adhesion.
- Remove any residual dust or contaminants after blasting.
3. Preparation on Previously Coated Surfaces
- Inspect the existing coating for adhesion and integrity.
- Remove all loose, flaking, or poorly adhered paint by scraping, sanding, or blasting.
- Abrade intact coatings to create a key for adhesion (e.g., sanding with 180–240 grit).
- Clean the surface thoroughly (solvent wipe or detergent wash as appropriate).
- Make sure the surface is completely dry before application.
4. Preparation on Galvanized or Aluminum Surfaces
- Clean by solvent wiping.
- Lightly abrade (sanding or sweep blasting) to remove oxidation.
- Remove dust and contaminants before coating.
5. Environmental Conditions
- Apply only when surface and ambient temperature are above 5°C (41°F) and at least 3°C above the dew point.
- Relative humidity should be below 85% to avoid moisture entrapment.
6. Additional Notes
- For best results, apply over compatible primers or intermediate coats as per system specifications.
- Avoid contamination by dirt, moisture, or oils during application.