How to Repair Peeling Paint on a Concrete Floor

Scrub the peeling paint off the floor with a wire brush.

Wet the floor down with water and note if it beads in any areas. Beads indicate the presence of grease and other oil-based substances. Wash the areas with TSP solution and a push broom. If water still beads, scrub the areas with concrete cleaner and a stiff brush.

Etch the floor with an etching solution recommended by the paint manufacturer. Etching refers to the process of applying an acidic solution to the floor to give it a slightly rough surface for the paint to properly adhere. Although it is important to follow the manufacturer’s instructions carefully, the etching solution is typically scrubbed into the floor with a broom and allowed to soak into the surface for a specified period of time. Note that drying times vary depending on the air temperature, the temperature of the concrete and the humidity level.

Mop the floor with water and allow it to dry.

Pour masonry alkyd primer into a paint roller pan, then immerse the roller brush in it. Roll it across the floor in the same manner used to operate a vacuum cleaner to apply the primer. Allow it to dry.

Pour waterproof masonry paint into the paint roller pan, then immerse the roller brush in the paint. Roll it across the floor in the same manner as the primer. Allow the paint to dry.

Apply a second coat of masonry paint to the floor. Allow it to dry.