Step 3 clean the seams.
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Use a spray bottle and some cold water to wet the areas where you removed the grout.
Choose the correct type of grout based on the width of your tile joints and where the repair is being done.
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If the width is 1 8 of an inch or smaller use an unsanded grout.
Allow the grout to begin to dry for about 10 minutes or until it resembles stiff putty then wash the surface of the tiles with a grout sponge to remove the excess grout.
This fix is only practical for interior tile floors and when the gaps between the tiles are 1 4 in.
Grout is available as sanded or unsanded.
Gently run the grout saw back and forth along the grout seams.
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Be careful to avoid damaging the tiles.
If the space is larger than 1 8 of an inch use a sanded grout.
Match the caulk at most tile specialty shops you can get or order sanded caulk most floor grouts are sanded that will closely match your existing grout color.
Lightly dampen the sponge.