Mix ¾ cup of sulfamic acid crystal with a bucket of water. Industry standard tile-cleaning-strength crystals are available at home and garden centers.
Spray water on small sections of the tile floor using a spray bottle. Apply the sulfamic acid solution to the wet area with a sponge and scrub gently. Allow the acid to soak for two to three minutes.
Rinse the area well using a clean, damp towel. Continue the process over the entire tiled floor. Keep the area you are working on wet.
Mix one cup baking soda with a bucket of warm water. Mop the entire floor with the mixture to neutralize the acid. Rinse with clear water and allow the tile to dry for 24 hours.
Apply a layer of tile sealant with a paintbrush or sprayer. Wait 30 minutes and apply a second layer. Allow 72 hours for the sealant to dry. Reapply the sealant every three to five years.
Things You Will Need
- Sulfamic acid crystals
- Spray bottle
- Baking soda
- Tile sealant
- Paint brush or sprayer
- Test the sulfamic acid mixture on a small area, rinse and allow it to dry for 24 hours. Acid-etch damage will be easily visible.