How to Remove the Grout Haze on Natural Stone

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Grout haze occurs when natural stone tile is not properly cleaned after grouting. When this happens, a thin layer of grout remains on the surface of the stone tile, making the tile appear hazy and dull. The longer the haze sits on the tile, the harder it will be to remove. Because natural stone is sensitive to acidic cleaners such as white vinegar, use the manual cleaning method if you only have a thin layer of grout haze.

Things You'll Need

  • Water
  • Plastic abrasive pads
  • Towels
  • Grout haze remover
  • Sponge

Manual Method

  • Cover the entire piece of stone with water and let it soak for several minutes. The water will help lubricate the area as you remove the haze so you don’t scratch the stone.

  • Scrub away the haze with plastic, scratch-free abrasive pads.

  • Pour more water on the area as it dries out.

  • Rinse the area with water and wipe it dry with towels.

Solvent Method

  • Dilute the grout haze remover to the least concentrated solution according to the manufacturer’s instructions. Only use grout haze remover intended for use on natural stone.

  • Dip a sponge into the remover and wring out as much of it as possible.

  • Rub the sponge over the natural stone. Let it sit according to the manufacturer’s instructions. Some may not call for any sitting time.

  • Rinse the sponge, wring it out and rub over the rest of the stone. If any grout haze remains, continue to the next step.

  • Dilute the grout haze remover to a more concentrated solution according to the manufacturer’s instructions. Repeat the application process with this solution until no grout haze remains.

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