New from MAPEI, Ultraflex LFT Rapid is a rapid-setting, nonsag medium-bed and thin-set mortar for large-format tile and stone. It can be used for interior/exterior floor, wall and countertop installations. This mortar has a high content of a unique dry polymer, resulting in excellent adhesion to the substrate and tile. Ultraflex LFT Rapid is Fast Track Ready™, allowing grouting in 3 to 4 hours, the company says.