Concrete Polishing Process
The basic process of concrete polishing is similar to sanding wood, as progressively finer grit sanding tools are used to sand wood similarly finer grit tools are used to polish concrete. Some finishes will leave aggregates exposed or protruding from the surface (a rough finish), others will take the surface down to a shiny, polished like surface. The process may be slightly different depending on whether it is a new floor or an existing floor
Typically the process will follow these steps;
- An initial cut with a sander with 3-4 passes. This is done dry or sometimes wet and will remove 3-5mm from the slab. On a new build this part of the process is typically performed before the walls are erected and as such, planning is a very important step in teh build process.
- A densifier is then applied to the surface to fill deep cracks and imperfections so that the final finish can be a uniform flat finish without imperfections. This step also requires time to let the densifier to cure.
- Next, after the densifier has hardened at least 1-2 more cuts are performed to level the floor. Sometimes a liquid hardener is applied to produce a high gloss finish.
- Final polishing is performed to the floor to bring it to the required level of shine.
- The concrete floor can then be sealed in one of 2 ways, either Diamond Finish where after the final 3000 grit polish is sealed with a standard stone and tile sealer to protect it from spills and oil stains or an Epoxy finish that is then finished in either a gloss or matte look. Both finished protect the surface from oil stains.