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%.
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 done by rolling a Nanten HM W mixture thinned with warm water (approx. +30°C). Adhesion sand is broadcast onto the primer film as work progresses, to prepare for subsequent coating. Once the primer has cured, any excess sand is removed by brushing and vacuuming.
Patching
Small holes and cracks are cleaned and filled with an epoxy putty made of for example, HM W Epoxy and fine filler sand.
Mixing
Pre-mix Part A and Part B of HM W Epoxy in their own containers. Estimate the required amount of mixture based on the size of the area to be treated and the working time of the product. Combine the components in the correct volume ratio and mix thoroughly with a low-speed mechanical mixer for approximately two minutes, avoiding air entrapment in the mixture. Add the required amount of the selected sand blend to the mixture while mixing, and continue until the mixture is uniform, making sure to reach the corners of the mixing container. For priming, add water as the final component after mixing and continue mixing for approximately 2 minutes.
Mixing ratio
Part A: 1 parts by volume, Part B: 2 part by volume
Coverage
At 3 mm film thickness
Resin consumption approx. 1.0 l/m²
For priming: 0.2–0.3 l/m²
For top coating: 0.3–0.35 l/m²
Color sand consumption approx. 5 kg/m²
Coating
The mixed material is poured onto the floor in a bead and spread with a notched trowel to the desired thickness. Application is carried out in strips, allowing finishing from untreated areas of the floor. The coating material is compacted with a steel trowel to achieve a smooth surface.
Top coating
The compacted trowel-applied coating is sealed by rolling on Nanten HM W Epoxy. The topcoat is typically applied in two coats as thin films.
Coved skirtings
Coved skirtings are made using the same trowel-applied mortar, stiffened with thickening fiber (Sylothix) to facilitate application.
Note! Inadequate mixing of the epoxy coating may lead to uneven curing, and an incorrect mixing ratio may result in the coating not curing at all. Do not scrape material from the sides of the container onto the floor.
Storage and handling of waste
See the separate storage and disposal instructions https://www.fescon.fi/en/material-bank