1. Please use a damp cloth to clean the installation area before using this product. After installation, you need to stand still for 6 hours to make the treads stickier and more durable. 2. Non-slip bathtub stickers work well for bathroom, bathtub, shower rooms, kitchen, swimming pool, stairs, floors, ladder and more. It really improves your family's on all kinds of slippery surfaces (Just works for smooth area). 3. The package comprises 20 pieces (diameter about 10.0cm or 3.95-inch) of clear stickers alongside 1 high-quality silicone scraper. Ideally, the 20 stickers should occupy at least 2/3 the surface thereby reducing the risk of accidental slips. On top of that, you can even use these stickers on the stairs to make them much more secure. 4. These stickers are designed to stick firmly on smooth surfaces (e.g. the soft PEVA material used for bathtubs) ing a strong adhesion and a great grip. This, further, provides you with a long-lasting slip and fall protection. The special glue used for these stickers can easily be removed without leaving any residue behind. And to top it all up, the stickers are non-toxic, fade-, , and convenient to use. You can use the sticker for bathtub, tub, tile shower floor etc.