Trace your patio stone on a large piece of paper if you want a specific design in the paver. Draw a rough sketch of your mosaic design on the paper. Begin with something large and easy-to-follow, such as a letter or number. Follow the design when placing your tiles. Or, create a design by adding pieces randomly, without a sketch.
Place glue on the back of each mosaic piece before you place it (wear rubber gloves while working). Lay each piece on the patio stone one at a time. Continue until the patio stone is full and complete.
Allow the stone to dry for 24 hours.
Apply the grout by pressing it into every gap and crevice between each mosaic piece. Wear rubber gloves during this process.
Scrape away excess grout with a grout scraper. Throw away excess grout.
Wipe your mosaic tiles with a dry towel to remove excess grout. Be careful not to disrupt the setting grout.
Allow to dry 30 minutes until the grout is firm.
Wipe over the entire mosaic with a wet towel until all grout is removed from the tops of the mosaic pieces.
Polish mosaic pieces with a soft, dry cloth.
Allow grout to set for 24 hours.