A premium one part formula with the high, fast bond strengths and flexibility to withstand horizontal movement to isolate substrate cracks. For time-critical commercial and residential installations under the most demanding requirements, capable of thin-set or medium bed application up to 3/4" (19 mm) thick on horizontal surfaces after beat in. Non-slump, medium-bed features provide the ultimate support for large format tile and stone. No need for two part additives to meet high bond and flexibility or compressive strength requirements. The rapid setting formula allows grouting in less than 3 hours, traffic in 4 hours. A 30 lb (13.6 kg) bag covers the same area as a 50 lb (22.68 kg) bag of traditional mortar. Use for interior or exterior floors, countertops and walls. Formulated with recycled material contributes to LEED® certification. Exceeds ANSI A118.4, A118.15 and A118.11 without the need for additives.