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 95%, 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 or shot blasting. 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 or shot blasting. 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 carried out using undiluted Nanten HM Bio Low VOC. The primer must seal all pores in the concrete to form a dense and continuous film on the surface.
Patching
Small holes and cracks must be cleaned and filled with an epoxy filler prepared from Nanten HM Bio Low VOC and fine filler sand. Larger and more extensive leveling or overfilling can be done using a filling/leveling compound made from Nanten SL Bio Low VOC and filler sand (grain size e.g. 0.1–0.6 mm).
Mixing
Pre-mix Part A and Part B of SL Bio Low VOC in their own containers. Estimate the required amount of mixture based on the size of the area and the working time. Combine the components in the correct ratio and mix with a low-speed mixer for approximately two minutes, avoiding air entrainment. Add the required amount of dry filler sand while mixing. Continue mixing for about one more minute. Ensure that material on the sides and bottom of the container is thoroughly mixed.
Mixing ratio
Part A: 3 parts by volume, Part B: 1 part by volume
(Filler sand approx. 15 kg / 20 l)
Coverage
At 2 mm film thickness: 2 l/m²
With added filler sand (1.5 kg/m²): 1.3 l/m²
Application instructions
If the primer has cured for more than two days, the surface must be roughened by sanding and sanding residues removed. The mixed compound is poured onto the floor in a puddle or continuous bead and spread with a smoothing trowel to the desired thickness. As work progresses, the surface is back-rolled with a spiked roller to remove air bubbles.
Note: Inadequate mixing of the epoxy coating may result in uneven curing, and an incorrect mixing ratio may prevent the material from curing at all. Do not scrape and apply material from the sides of the mixing container onto the floor.
Varastointi ja jätteen käsittely
Katso erillinen varastointi ja hävitysohje https://www.fescon.fi/materiaalipankki