Iridescent Glass Pool Tile Ocean Turquoise 1x2 gives the texture and appearance of the ocean's surface. It also has an iridescent finish that plays well with natural light. Good for wet and dry applications such as swimming pools, backsplash, and showers. This glass mosaic tile comes face mounted on a 12 inches by 12 inches clear sheet for an easy installation, and it is 5/16 of an inch thick. The clear tape is the front of the tile. We recommend peeling off the clear tape after the tile is installed on the surface and the setting material has dried, then follow with grout application. It is common to have the back of the sheet slightly chipped off on some of the edges, however this will not affect the end result since this is the back of the tile and will be hidden on the surface with the thin set material.