Keraflex SG is a standard-grade, versatile, large-and-heavy-tile mortar and thin-set mortar for tile and stone installations on floors, walls, and countertops; Formulated as non-sag for walls and nonslump for floors; Polymer-modified mortar with Easy Glide Technology™ for ease of application; Offers good adhesion to substrates and tile; Can be used as a mortar over uncoupling, crack-isolation, sound-reduction, and waterproofing membranes.