How To Remove Concrete Sealer From Driveway. Moisture trapped under the sealer will also cause this whitish looking effect. Being very careful to avoid spills and splashes apply the chemical to the affected area.
Pressure washer=> check on amazon=> Test your floor for sealer by mixing equal parts muriatic acid and water in your glass measuring cup. Allow the xylene to sit for 20 seconds.
If it is a large area then pour onto the surface, and then spread using a broom or similar.
Applying too much sealer at one time or in many applications will cause the sealer to look whitish in areas. Let it sit for a few minutes, then scrub the area with a scrub brush. Use a soft brush to scrub the area. In order to fix existing scratching, wipe xylene on the area and reapply an extremely light new coat of concrete sealer.