However these products are more effective when used in cool draft free conditions because heat and wind tend to cause rapid solvent evaporation and slow or stop the stripping process.
How to remove polyurethane from concrete floor.
Wipe the floor thoroughly with a microfiber cloth to remove dust.
Epoxy binds with concrete for a lifetime of coverage.
Remnants and residues left over aren t pleasant to look at and make it impossible to add new decor or refinish to the concrete.
With that said many homeowners choose to use a floor grinder to remove epoxy from their garage floors.
However if you do this odds are that some adhesive will be left behind in the process.
After you ve removed most of the polyurethane sand down what remains.
The common sealer resins used on concrete acrylic epoxy polyurethane polyaspartic and polyurea are no match for a good solvent based chemical stripper.
Clean under cabinets or baseboards to ensure that no dust balls fall on your floor as you apply the polyurethane.
Lacquer thinner will not hurt the concrete and will not of itself stain the concrete.
Concrete is porous so it may not all come up.
As such it is one of the most difficult substances to remove.
Concrete floors aren t the eyesore they used to be.
The sandpaper will smooth it out and take off the last of the polyurethane.
In an unobtrusive spot on the concrete try some brake fluid to see what effect it has on your concrete.
However there is risk of damaging or altering the concrete surface causing it to reflect through a new coating.
It often takes several coats of lacquer or paint stripper to cut away at epoxy concrete sealants.
There are some that will remove polyurethanes you will have to ask which ones or read the labels.
Coatings can be removed mechanically by sandblasting beadblasting diamond grinding or sanding.
See if it softens the polyurethane.
Sand the surface to remove polyurethane.
If no objectionable appearance try the brake fluid on the polyurethane.
Wait at least a week to judge the appearance.
You can also use 150 grit sandpaper.