Brush grout line clean

Step 5:

Clean the grout lines with a sponge or a small disposable brush. Let the exposed grout dry an hour and brush once more.

Smooth grout with finger

Step 6:

Fill in the joints with pre-mixed grout.  One trick is to simply wet your finger and use it to force the grout into the joint.

Partially filled grout line

Step 7:

Use as much grout as necessary to bring the grout to the level of the existing grout.  Make sure the joint is smooth and has no gaps in the grout.

Float grout with sponge trowel

Step 8:

Whenever the excess grout begins to form a whitish haze on the tile (usually an hour or so) you need to clean it up.  Take a damp sponge and gently wipe away the excess.  Take care not to disturb the grout in the joint.  It is not hard yet and if you wipe across it, you will wipe it onto the tile.  You may have to take a soft cloth and polish away the excess grout.

Sponge off grout haze

Step 9:

Let the grout dry for 48 hours (check the package for details) before exposing the grout to moisture.  It is normally a good idea to seal the grout with a silicone grout sealer but some pre-mixed formulas have a sealer in them.  Check the package.

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