HENRY® 314 ReadySet™ Premixed Mastic Adhesive is a premium, installer-grade adhesive for installing porcelain, quarry, stone and ceramic tiles over interior walls, floors and countertops. HENRY 314 can be used to install tile sizes up to 6 x 6" (15 x 15 cm) on floors and 12 x 12" (30.5 x 30.5 cm) on walls, including mosaics, and has excellent grab.