Although unused and unopened, this is a very old item that has been stored for many years, as indicated by the packaging. I opened another roll and found that the sliding door track itself shows no particular signs of deterioration, and the release paper is not peeling. However, the practicality of the adhesive strength is unknown. (I confirmed that it has enough adhesive to stick to a wall.) Please consider this with the above in mind. I will include 8 rolls, including the one that was opened for inspection.