The Original, do-it-yourself peel and stick tile concept of Smart Tiles is made of an adhesive substrate topped with a gel component called Gel-O (which gives it a 3-dimensional effect). Guaranteed to stick without adding extra glue and the clear Gel-O component will never yellow or crack with time. The tiles are lightweight, easy to handle, cut and maintain. The tiles can be installed in minutes over a clean and sleek surface without any mess or specialized tools. Especially designed for kitchen and bathroom environments (i.e., backsplashes). The tiles are resistant to the heat of stovetops and the humidity of bathrooms (do not use in shower).