FORTIS PRIME 520 water based polyurethane.
FORTIS PRIME 520 is a two-component, clear, water-based polyurethane primer build coat, suitable sealing and priming porous substrates. Excellent for both concrete and timber.
2 Component Water-based Polyurethane
Non-yellowing Medium build Water-based two-pack Exterior / Interior use Low odour Excellent adhesion to siliceous and most polar compounds Chemically resistant Cures well in humid or cold conditions
Use a Jiffy Mixer or similar with a variable speed drill, according to the manufacturer’s recommendations. Add the hardener slowly and evenly into the mixing vortex in the resin component, while maintaining a constant mixing speed throughout the addition. Avoid entraining air. Continue mixing for a minimum of three minutes. Proper mixing of the viscous hardener into the low viscosity resin component is essential to achieve proper coating properties. Filter before use. Mixed product has a pot life of 2 hours at 25°C.
For new wood and fully sanded old timber surfaces, final sand with 220 grit sandpaper.
For concrete surfaces, best results are obtained from diamond-grinding or sanding. If diamond grinding or sanding is not possible, acid etching may be used. Apply 1 - 2 coats of FORTIS PRIME 520, followed by 1 or 2 coats of FORTIS COAT 526 Gloss or Satin depending on required finish.