How to Remove Dried Mapei Sanded Grout With a Polymer

Mapei Sanded Grout with Polymer is designed to be easy to use at home with simple tools. But even professional installers make mistakes. A wet sponge is all you need to wipe up fresh accidents. But sometimes misplaced grout dries in place before it is detected and cleaned up. Dried Mapei grout is tough to remove, but not permanent. The sooner you tackle the dried grout, the better. The longer Mapei grout sits, the harder it gets.

Paint stick
Utility knife
Spray bottle
Scrubbing sponge
Soft towel

Instructions

- 1
  Cut a paint stir stick into thirds with a utility knife. The shorter lengths are sturdier and easier to use.
- 2
  Wet the affected area with water from a spray bottle. Cover nearby desirable grout with plastic to avoid getting the new, uncured grout wet.
- 3
  Place the edge of a cut paint stick on the outer perimeter of the affected area. Push the edge firmly and aggressively into the grout clumps with short strokes. Keep pushing until the majority of the large clumps lift from the surface. Keep the area moist as you work. The grout will eat through the paint sticks. Change them as necessary to keep a sharp, cut square edge.
- 4
  Wipe up the removed grout with a wet sponge. Scoop the grout up. Do not drag or scrub the grout. You may scratch the surface of the tile.
- 5
  Wet the area again. Scrub the remaining grout up with a scrubbing sponge. Keep the surface wet as you scrub.
- 6
  Wipe the area clean with a wet sponge.
- 7
  Buff the area dry with a clean towel. If the towel snags on residual clinging grout, repeat the previous two steps.

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