Type 1 is a premium-grade, traditional, nonflammable, acrylic adhesive for setting glazed and unglazed ceramic and porcelain tiles on walls, floors and countertops. This adhesive is used for interior applications only. Excellent grab: Up to 12" x 12" (30 x 30 cm) tile For use with most types of glazed and unglazed ceramic and porcelain tile, and ceramic and porcelain mosaics for walls and floors Use to install tiles up to 6" x 6" (15 x 15 cm) on floors, and up to 12" x 12" (30 x 30 cm) on walls For tub and bath surrounds where service requirements do not exceed ANSI A136.1, Type 1 For the installation of tile on walls in intermittent wet conditions such as tub and shower surrounds