How to Remove White Spots From a Black Slate

Tucker Cummings

Black slate flooring is a stylish and popular choice for interior home flooring, as well as for outdoor patio areas in the backyard. However, one problem some homeowners have encountered is that certain household substances that contain bleach or acids can interact with the black slate and cause white spots to appear. Removing these small stubborn white spots can be tricky, and may require some assistance from a trained professional who works with black slate.

Step 1

Mix one part liquid castille soap or detergent with 40 parts water.

Step 2

Scrub the black slate with the cleaning solution, using a soft sponge or mop. Avoid stiff brushes or scrubbers that could scratch the surface of the slate.

Step 3

Rinse the slate well with plenty of water to remove any residue.