Custom Building Products MTSG50 VersaBond Fortified Thin-Set, 50-Pound, Mortar Grey This item is Custom Building Products MTSG50 VersaBond Fortified Thin-Set, 50-Pound, Mortar Grey Used for Painting Supplies Patch, Fill & Repair This product is Manufactured in United States Use for interior or exterior floors, countertops and walls Excellent handling characteristics through extended open and adjustment times Exceeds ANSI A1184 and A11811 standards without the need for additives