An anti-humidity primer such as Wakol PU 280 is used for several important reasons in the preparation of floors prior to the installation of floor coverings:

Protection against excessive humidity

• Blocks residual moisture in concrete screeds up to:
  • 6% CM / 98% RH for screeds without underfloor heating
  • 3% CM / 85% RH for screeds with underfloor heating
• Protects moisture-sensitive floor coverings from potential damage

Improved adhesion

• Acts as a primer on absorbent and non-absorbent substrates
• Strengthens weakened screed surfaces

Conditions of use

• Substrate temperature ≥ 15°C
• Concrete screed at least 28 days old
• Surface dry, with no visible water
• Intact structural waterproof membrane under the slab

Advantages

• Single-component, ready to use
• Fast drying (40-50 minutes)
• Solvent-free and very low emissions
• Compatible with underfloor heating
• Can be used in basements and in areas with high humidity

Wakol PU 280 is particularly recommended for installing wooden floors in high-humidity environments such as basements, offering reliable protection against potential moisture-related problems such as mould, warping and deformation of the wood.