Waterproof layer specifications: Material: silicone Color: black/white/grey Length: 150 cm Height: 30 mm Features: 1. Long and flexible design allows creation of various shapes. 2. Shower barriers and retention systems keep water within the threshold. 3. Ideal for curbless showers and other areas that need to hold water. 4. This product comes with adhesive backing, which is easy to install. The product is micro-magnetic, and with the glass adhesive we give you, it is close to the ground and does not leak. Instructions for use: 1. Wipe off water and dust on the ground. 2. Determine the location of the water retaining strip and mark it on the ground with a pen. 3. Remove the adhesive and install the waterproof barrier in the marked location. 4. Seal the rubber strips where both ends of the water retaining strip are in contact with the wall. 5. Apply glue on both sides of the water stopper and spread evenly.