I used this product as directed by the instructions on all four corners of my hallway runner. It was easy to install, and the adhesive worked instantly. The corners of my rug have been permanently curled ever since I got this used rug. And in an instant they are flat. The flat side of the pad goes on your rug. The wavy side of the pad sticks to your Floor. No more rug sliding either! I’m interested to see how it holds up in the long run but so far I’m a fan! Great product! Would buy again!