We have a precast concrete garage from the company Rekers. I want to seal the floor. What I have learned is that such a sealing should be resistant to
- oil, diesel, gasoline
- (weak) acids and alkalis
- plasticizers (from car tires)
Furthermore, the coating should be vapor permeable (against rising moisture).
The means of choice are apparently two-component coating systems based on epoxy resin. These are sold as "2K garage seal," "2K floor sealing," or "2K coating" (generally: aqueous two-component epoxy resin sealing) in the trade. The following structure is usually recommended:
- primer
- 1 to 2 coats
- topcoat (sealing)
Optionally, quartz sand or glass beads can be incorporated into the top layer as an anti-slip additive. It is also optional to sprinkle colored chips into the top coat (the surface is thus not uniformly gray but black/white or colorful speckled).
Besides epoxy resin dispersions, there are those based on acrylic (less common?) and single-component floor paints/concrete paints (simpler, cheaper). I do not know the former or could not find any useful information, while the latter usually lack the aforementioned resistances.
Potassium water glass seems rather unsuitable for floors (or differently: secondary to the aforementioned solutions).
Questions to the group:
- Have you had any experience with specific products from the hardware store?
- How many layers did you apply?
- Did you use anti-slip additives?