Base requirements and coating conditions
The concrete strength class must be at least C25/30 with a wear resistance class of 3. The relative humidity of the concrete must be below 98%, and the surface temperature must be at least +3°C above the dew point. During application and curing, the temperature of the air, surface, and coating must remain above +15°C, and the relative humidity of the air must be below 80%. Always ensure the suitability of the coating for the intended substrate.
New concrete floor
Cement laitance and any uncured cement must be removed by surface grinding. All loose and adhesion-reducing material must be removed, and the surface must be thoroughly vacuumed to remove all cement dust.
Old concrete floor
Cement laitance and deteriorated concrete must be removed by grinding. All loose and adhesion-reducing material must be removed, and the surface must be thoroughly vacuumed. Dirty floors should be washed and rinsed with a synthetic detergent before any further surface preparation. Any existing old paint film must be completely removed from the substrate.
Priming
Priming is done with thinned PU W1.
Patching
Small holes and cracks must be cleaned and filled with an epoxy filler prepared from Nanten HM Bio Epoxy and fine filler sand. Larger overfills/levelling can be done with a cement-based screed that has sufficient adhesion (>1.5 MPa) and strength (>25 MPa).
Mixing
Mix the varnish/paint thoroughly using a mechanical mixer. Reseal the container tightly between uses.
Coverage
Approx. 0.25 l/m² in two coats.
Application instructions
The mixed varnish/paint is applied using a flotex trowel or a mohair roller. Avoid forming an excessively thick film to ensure even drying. The second coat should be applied by cross-rolling after the first coat has dried.
Note the product’s very fast drying time — avoid application when the substrate or ambient air temperature exceeds +30°C. On porous, absorbent substrates, the paint/varnish must be sufficiently diluted with water.
Storage and handling of waste
See the separate storage and disposal instructions https://www.fescon.fi/en/material-bank