Nippon Paint Penetrative Epoxy Primer is a high-performance, two-pack solvent-based amine-cured epoxy designed with exceptionally low viscosity. Unlike standard primers that sit on the surface, this formula is engineered to penetrate deep into the capillaries of concrete substrates.
It acts as a powerful "binder" for weak or porous concrete, sealing the surface to prevent "dusting" and providing a rock-solid foundation for subsequent epoxy or polyurethane topcoats. It is the ideal solution for industrial floors, warehouses, and car parks where superior adhesion and substrate reinforcement are critical for long-term durability.
Paint Type: Two-pack Epoxy (Solvent-based)
Finish: Gloss (Clear)
Mixing Ratio: 4 parts Base to 1 part Hardener (by volume)
Pot Life: 6 – 8 hours after mixing (at 25°C – 30°C)
Theoretical Coverage: 6.0 – 10.0 m² per litre (depending on substrate porosity)
Drying Time (at 30°C):
Touch Dry: 2 hours
Hard Dry: 16 hours
Recoating Interval: Minimum 16 hours; Maximum 7 days
Shelf Life: Up to 24 months in a tightly sealed container
Specific Gravity: 0.90 – 1.00 (Mixed)
Mixing: Stir the Base (Part A) thoroughly. Add the Hardener (Part B) and mix continuously for 3–5 minutes until the mixture is completely homogeneous.
Thinning: This product is designed for high penetration; thinning is generally not required. If necessary, use Nippon SA-65 Thinner (max 5%).
Application Method: Roller or brush is recommended to ensure the primer is worked into the concrete pores. For very porous surfaces, a second coat may be required if the first coat is completely absorbed.
Cleaning: Clean all tools and equipment immediately after use with Nippon SA-65 Thinner.
For a professional-grade industrial floor finish, follow this sequence:
Primer (1-2 Coats): Nippon Paint Penetrative Epoxy Primer.
Finish (2 Coats): Nippon Paint EA4 Finish or Nippon Paint EA9 Finish HB.
Concrete Maturity: New concrete must be cured for at least 28 days with a moisture content below 4%.
Surface Cleanliness: The substrate must be clean and free from laitance, oil, grease, curing compounds, and other contaminants.
Mechanical Preparation: For optimum penetration, smooth concrete should be lightly track-blasted, scarified, or mechanically ground to open the pores.
Dust Removal: Ensure the surface is thoroughly vacuumed after mechanical preparation; any remaining dust will hinder the penetration of the primer.
Environmental Conditions: Do not apply if the relative humidity exceeds 85% or if the surface temperature is less than 3°C above the dew point.
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