How to Fix a Tiny Crack in Grout

Quick Patch

• 1

  Purchase grout in the same color--or as close as possible to the same color--as the grout you're about to repair. Most grouts are white or off-white.

• 2

  Mix the grout with enough water to form a wet paste. A slightly runny texture ensures the new grout is able to get into the crack and not just on top of it.

• 3

  Apply new grout to the cracked area, using your finger or a small sponge to press the grout into the crack.

• 4

  Wipe away excess grout from the tiles after it has set but before it dries, using a damp sponge. Leave the tiles to dry completely.

• 5

  Buff the surrounding tile with a soft, dry fabric such as cheesecloth to remove any grout haze that remains. Allow the grout to dry completely.

• 6

  Seal the patched area with a standard grout sealer.

Professional Repair

• 7

  Remove all loose material from the cracked area, using a carbide grout scraper or a flat-head screwdriver.

• 8

  Widen the crack slightly, using the screwdriver. This provides the new grout with a surface it can better adhere to.

• 9

  Mix the new grout into a wet paste and apply to the crack with the sponge.

• 10

  Wipe away excess grout after it has set but before it dries, using a damp sponge.

• 11

  Buff the surrounding tile with a dry, soft fabric cloth to remove any remaining grout haze. Let the grout dry completely and seal the patched area with a standard grout sealer.