Create Mosaic Magic in Your Garden
Grout and finish your piece
Mix grout according to package directions to a mudlike consistency. Slather grout into the crevices between mosaic pieces using a tile float or your gloved fingertips. Let set 10 to 15 minutes. Remove excess grout by wiping the mosaic with a clean, damp sponge. Polish off the remaining fimy residue with a soft cloth. Let dry, then apply a grout sealer, if desired, to prevent staining.