How to Clean Grout Haze With Muratic Acid

To avoid grout haze, wipe your tiles while the grout is still wet.

Grout haze is the cloudy film that appears on tiles after grouting. Grout haze occurs when grout dries on the tile, but the haze can be avoided by simply wiping off the tiles with a damp sponge when the grout is still wet. Muratic acid will also remove grout haze, but should be only used as a last resort because the acid can permanently stain the tiles if not done properly.

Things You'll Need

• Goggles
• Protective gloves
• Face mask
• Gallon bucket
• Nylon scrub brush
• Muratic acid
• Warm water
• Cloth

Instructions

1. Put on goggles, protective gloves and a face mask to protect your lungs and skin from the muratic acid.

2. Pour 8 tablespoons of warm water in the bucket, then add 1 tablespoon of muratic acid. Test this solution on extra tile or on tiles in a hidden area before applying to all of the tiles.

3. Wet your nylon brush in the acid solution and scrub the affected tiles. Continue to scrub until the grout haze is no longer visible.

4. Wipe off the tile using a cloth dampened with hot water. Allow the tiles to air dry.

Tips & Warnings

• Always add muratic acid to water as opposed to adding water to muratic acid to prevent splashing and injury from the acid.

• Always wear protective clothing and gear when working with any acid.

• Only use muratic acid outdoors or in a well-ventilated area to avoid excessive exposure to the fumes.

References

• The Restoration Resource: Tips And Techniques How To Clean Ceramic Tiles And Grout
• The Natural Handyman: Muriatic Acid and Cleaning Masonry Surfaces
• Easy Renovate: Grout Haze Cleaning