Bostik Big Tile & Stone™ is a polymer-modified, large and heavy tile mortar used for interior or exterior installations to set large format tiles, and can also be used for vertical applications. Big Tile & Stone™ may be used for uneven tile and stone thicknesses; or to minimize lippage. Big Tile & Stone™ white formulation is approved for non-sag applications for tiles up to 12" x 24".