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How Long Should Grout Sit Before Sponging? [Solved]
about 15 minutes Sponging the grout too soon will pull it out of the joints, so let it set for about 15 minutes. After that, use a damp sponge to clean the face of the tiles in a light, circular motion. Next, clean the sponge and go over the tile again, wiping at a slight diagonal to the joint.12 Jun 2013
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