Buff the surface of the glass mosaic tile using a fine-grain buffer, which will remove any residual finish off of the glass tiles without scratching or damaging the glass.
Wipe off the glass mosaic tiles using a washcloth to remove any dust or debris caused by the buffer.
Pour clear latex glaze into a bowl, and then dip a paintbrush into the glaze to coat the brush. Slide the brush along the side of the bowl to remove excess glaze from the brush on either side.
Paint the glaze over the top of the glass mosaic tile in one direction, which will allow the glaze to be applied in a more uniform and even manner. Cover the entire surface with a single layer. Allow the glaze to dry for 2 hours.
Apply a second layer of clear latex glaze in the same manner as before, and then allow the glaze to dry for an additional 2 hours before using the glass mosaic tile.