How to Clean Up a Concrete Slab Using a Rub Brick

A concrete rub brick can help remove stains, spots and rough patches in a concrete slab. Similar to sandpaper, the grit in the rub brick rubs away the top layer of concrete surface, leaving behind a smooth, clean surface. Using a concrete rub brick should only occur when routine cleaning fails to remove spots and stains. Continuously using the rub brick may make your concrete slab uneven.

Step 1

Spray the concrete slab with a hose to remove dirt and dust.

Step 2

Mix hot water with a concrete cleaner in a bucket. Follow the manufacturer's recommendations for directions on how much cleaner to add per gallon of water.

Step 3

Dip a deck mop or cleaning brush into the soapy water. Clean the concrete.

Step 4

Spray the concrete slab with a hose to remove soap residue. Allow the concrete to air dry.

Step 5

Hold the handle of a concrete rub brick in your hand. Rub the brick, in a back-and-forth motion, against stains or uneven concrete. Continue rubbing all spots and stains until gone.

Step 6

Spray down the concrete with a hose to remove concrete dust. Allow the concrete slab to air dry.