Mapei Mapecem 102 Medium-Build Fast-Setting MortarNeed to build up a tile bed deeper than thinset can manage? Mapecem 102 is a medium build mortar that lays down to thick in a single pass firm enough to start tiling in 2 3 hours and walk on in 4. Just add water; no latex or polymer additive needed. Built for floors with dips, transitions between underlayments, or shower bench builds where standard thinset would slump or sag. The fast cure compresses a full day's prep to tile into an afternoon. 24. 9