How to Treat a Grout Stain Under Old Caulk

Tile grout can become stained over the course of time from accidental spills, foot traffic and other stains. Even grout under caulk can become discolored. While cleaning the stains is not difficult, it will take a bit of patience and good dose of elbow grease to remove the grout stains. You'll only need a few tools and some cleaning supplies to remove the grout stains and return the grout to its original state.

Putty knife
Toothbrush
Rubber gloves
Oxygen bleach
Grout brush
Sponge
Grout sealer
Paintbrush
Caulk
Caulk gun

Instructions

- 1
  Scrape up the old caulk with a putty knife, then scrub over the grout with a toothbrush to remove any other loose debris.
- 2
  Put on rubber gloves and pour oxygen bleach over the stains in the grout. Allow it to soak in for a few minutes, then vigorously scrub the grout clean with a grout brush. This may take several minutes, depending on the stain.
- 3
  Dampen a sponge with water and rub over the grout to take up the oxygen bleach and rinse the grout.
- 4
  Apply a coat of grout sealer over the grout using a paintbrush and let it dry as long as directed by the manufacturer. Then apply a second coat of sealer and allow it to dry.
- 5
  Run a bead of new caulk over the grout using a caulk gun to finish the cleaning project.

How to Care for Pine Flooring

How to Lay Plywood Planks

Floor Repairs