How to Remove White Spots From a Black Slate
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.
Mix one part liquid castille soap or detergent with 40 parts water.
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.
Rinse the slate well with plenty of water to remove any residue.
- Contact a stonemason or slate expert if the stains are still present. You can have this professional stone refinisher re-grind and re-hone the surface of the black slate to wear away the stained areas. However, note that if the black slate is a natural cleft finish, the stains may be untreatable.
- To prevent future staining, have your slate sealed. The material is porous, so sealing it will protect it from staining and scratches in the future. You can purchase slate sealing compound from a flooring retailer.
- When acids or bleach fall onto the surface of black slate, soak them up with a dry cloth immediately to prevent more white spots from forming on the surface.
- Avoid using scouring powders and creams on your slate.
Tucker Cummings is a freelance writer based in New England. She holds two Bachelor of Arts degrees from the University of New Hampshire and is a member of the Association of Professional Business Writers. Cummings is also a food writer and curates the blog, Brave New Breakfast.