How would one grout mosaic tiles on standing mirror?
Grout application on a mirror is exactly the same process as grouting a tile floor, back-splash, counter top, or table. Since the mirror is standing, I'd be sure that the mirror won't topple over when applying the grout because it has to be floated into the crevices between the tiles / tile pieces. If possible I'd suggest laying the mirror flat, either on the floor or on a sturdy worktable A grout float is basically a block shaped pushing tool used to force the grout between the tiles. Hold the float at an angle against the tiled surface and use a firm sweeping motion across the tile to push/force the grout into all the nooks, crannies, cracks and openings between the tiles. You'll have to work fairly quickly because grout becomes hard to work once it starts drying out. Work in a diagonal pattern and go back over any low or missed areas. Allow the grout to sit for 20-30 minutes. You'll know the grout is starting to cure when there is a light haze on the tile surface. Using a sponge and a bucket of clean water lightly buff the tile to remove the haze. This step may have to be repeated once or twice to be sure that all of the excess grout has been removed from the tile surface. If you want to seal the grout and tile, there are a number of sealant products available but you'll need to wait 3 or 4 days before applying in order to allow the grout to cure properly.
