So about twenty 1 1/2 inch tiles in my shower came loose. I took them out, cleaned the floors and tile, dried floor for several days, thin set the floor, set tiles, let dry for several days grouted, dried before use. Everything looked great when finished, but within a week the grout was coming loose and the tiles quickly came back out. I did the hole proceed a second time, but let dry longer, and the same thing happened. Will a primer (like TEC multipurpose primer) get the tile to stick? If so should I apply the primer to the floor and the tile before thin-set, or just the floor ? thanks
