A mosaic glass tile backsplash can add a touch of style to your kitchen. However, you must use the right type of grout to strengthen the tiled surface and improve the look of the backsplash as well. For a mosaic glass tile backsplash, you can use latex-modified grout which is a combination of latex, cement, sand and water. This grout can be sanded or non-sanded depending upon your preference of texture. Epoxy grout is also ideal for glass tile backsplashes since it is waterproof, easy-to-clean and durable. Using the right kind of grout can make a big difference to the overall look of your backsplash.