Ardex X4 LFT Large Format Tile and Stone Mortar Gray 40lb

ARDEX X 4™ is a polymer modified mortar for setting most types of tile including mosaics and natural stone* over common interior surfaces including exterior grade plywood, as well as over exterior concrete and masonry surfaces. ARDEX X 4 mortar can be used to set porcelain tiles on horizontal exterior concrete or masonry surfaces.