DimensionTM StarGlass Reflective, Pre-Mixed Urethane Grout is a patented, glass filled, ready-to-use, water based, urethane grout. Dimension contains micro glass beads and a translucent, urethane binder that both reflect light as well as allow it to pass through. This creates a unique reflective appearance in all tile installations as well as a three dimensional effect within glass tile installations. Other grouts contain light-absorbing materials that can detract from the tile's appearance. Dimension StarGlass also looks great with stone, marble and granite tile.