Can you use this kit on cement countertops?

Giani may be applied to concrete counters as long as they are indoor, fully cured, and free of concrete sealer. If there is a sealer on the surface, you’ll need to use a xylene or lacquer thinner to remove it. Be sure to follow all of the manufacturer’s instructions regarding ventilation and extinguishing pilot lights, because xylene/lacquer thinner is very flammable! After you’ve used the xylene or lacquer thinner, follow with rubbing alcohol to remove all residue. It is typically a good idea to acid wash the surface to prep for paint adhesion. You can find some tips on acid washing concrete on this page https://www.wikihow.com/Acid-Wash-Concrete. Be sure to let your counters dry out for several days before beginning the process. Concrete is very porous, so even if the surface feels dry to the touch, more moisture will need to evaporate from the underneath layers of the surface.