How To Remove Concrete Sealer From Skin. Sprinkle an absorbent material, such as kitty litter, cornmeal or talcum powder, over the paint thinner. Basically, there are two ways by which you can remove sealer from a concrete surface.
Unfortunately, it's often the only way to prepare, restore or repair a concrete surface. If the acetone doesn't do it, use methylene chloride. Ad deliver peace of mind with the best sealing solutions for ships, pumps and tidal turbines.
Chemical, using a chemical stripper to remove the the coating
Check any areas that still have the sealer and spray them with your concrete sealer remover again. Spray the concrete with a power washer to remove the permanent marker stain. The power washer will strip away a very thin layer of concrete, removing the stain unless it has penetrated into the surface. Trisodium phosphate is a chemical compound that can be used to remove stains and grease from concrete.