ARDEX N 23™ MICROTEC® Rapid Set Natural Stone and Tile Mortar A rapid setting thin to medium bed mortar formulated with proprietary self-drying formulation to prevent warping, staining and discoloration of moisture sensitive stone including translucent marble and granite. Use to install all types of tile and stone and is ideal for ungauged and agglomerate stone. Rapid setting; grout in only 2 hours Unique creamy consistency; very easy to apply Thin to medium bed applications up to 5/8” (15 mm) Excellent sag resistance and strength Open time: 30 minutes Pot life: 60 minutes, Working time: 15 minutes 40 lb (18 kg) bag, Gray and White Coverage: 103 sq. ft. (9.5 m2)