A tile mortar, composed of Portland cement, for Schluter®-DITRA® and Schluter®-KERDI® and for uncoupling & waterproofing membranes. A product that provides terrific workability, excellent durability, significant leveling characteristics, and superior bond strengths—for interior and exterior applications when used with Schluter®-DITRA® uncoupling membrane, and Schluter®-KERDI® waterproofing membrane. Apply the membranes over substrates approved by Schluter®-Systems, when setting ceramic, porcelain, and stone tile over Schluter®-DITRA® and Schluter®-KERDI®