Have stuck a few weeks ago on my bathtub floor this non-slip stickers. The sticker keep seeing good and above all, they prevent slipping fast, of course you should be careful in spite of everything. It is important that the adherend surface is absolutely free of grease, have this cleaned with alcohol from the pharmacy, the stick firmly press and press out the air bubbles such as a silicon scraper. At the end, press again the edges carefully. I've been waiting for for about 24 hours before the first use. So far, everything is fine and that sticks should be discolored sometime just makes you look towards new, at the price no problem! Wish all yourselfers "succeed good".