I was excited when I received the tiles and they looked pretty in the package. Once open though I saw the adhesive was just double stick tape around the edges. If you need heavy duty application for heat or moisture or need to cut them you will need to use additional adhesive. I did a fake placement using scotch tape and once I took a step back I realized how cheap they look as a backsplash and have decided to return them. Very sad because I've used other stick on tiles that were much better quality and had full adhesive on the back.