Ardex - X 4 Large Format Tile & Stone Mortar, Gray 40 lb

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.

• Ideal for large format tile and stone

• Use for setting porcelain, quarry, ceramic and most natural stone (moisture insensitive) tiles

• Use above and below uncoupling membranes

• Easy to mix and apply

• 3-hour pot life

• Interior or exterior use; water and frost resistant