Flexible, acrylic polymer, cement-based thin set and medium bed mortar with polymer additive for application layers of up to 25/32″ (20 mm) for interior and exterior installations according to EN 12 004 C2 FE-S1. Servoflex-Trio-SuperTec is especially formulated to provide full mortar transfer to avoid air entrapments between mortar and covering without the disadvantage of floating bed mortar billowing through joints. Servoflex-Trio-SuperTec will hold heavy stone without sagging. Servoflex-Trio-SuperTec is especially suitable for large modular ceramic tile installations, porcelain stoneware and natural stone coverings on limited form stable substrates such as heated screed (please follow the respective regulations and data sheets), in situ concrete (at least 3 months old) and similar. By increasing the water content to approx. 1.8 US gal. (7.0 liters) per bag you yield a pourable floating bed mortar allowing an even installation without air pockets. Thus the back buttering-floating technique does not apply here. Servoflex-Trio-SuperTec will hold heavy stone, large tiles without sagging. Heated floors can be operational after three days only * (please follow local and manufacturer specifications).