Remove grout from grout


After grouting, especially in the method of slurrying, creates a veil on tile and board surfaces. Streaks in streaks can be removed with detergent. When selecting the product, the condition of the tiles or panels must be taken into account to avoid irreparable damage.

Concentrated, light or no acid

Acid-based removers are common in order to remove the veil resulting from jointing mortar on the surfaces of tiles. Glazed, ceramic and sealed surfaces are relatively insensitive. In addition to special acid-based agents, some cheap home remedies do the job.

For natural rock with open pores, removing mortar and veils can severely damage surfaces and substance. For many types of stone, a slightly acidic Phosphatsäurereiniger is suitable. Sensitive soft rocks such as limestone and sandstone do not tolerate these remedies.

Acidic detergents

Most commercially available cement scum removers are acid based. Alternatively, the following similar effective home remedies can be used if the surfaces are sealed acid-proof:

citric acid

Distribute pure or concentrated lemon juice with splashes on the surfaces. After a few minutes, warm with warm water and scrub with clear water.

vinegar solution

With vinegar dissolved in hot water (ratio 1:10) or vinegar essence (ratio 1: 5), wipe the surfaces several times wet.

Insider tip Cola

When mortar with cola is removed, acid is also the solvent and cleansing agent. The surfaces are scrubbed with a Cola soaked root brush or a scrubber and rinsed several times with clear lukewarm water.

Milder and acid-free agents

Phosphate acid is only slightly acidic and can be dissolved in cleaning water on most natural stone surfaces (ratio approx. 1:20) as wiping agent. The reaction times are significantly increased compared to more aggressive acids and can be several hours.

For very sensitive rocks, the removal of mortar and veil must be done mechanically. Neutral soap and suitable rock oil can aid in polishing with a drilling or polishing machine.

Tips & Tricks

Always wait for the complete setting and drying of mortar before removing joint mortar. If the procedure is too early, the cleaning agent may otherwise dissolve the joint fillings or prevent the setting.

Product Image: thodonal88 / Shutterstock


Video Board: Removing Old Grout From Tile