It does exactly what I needed it to do, and will surely do many other things besides.  I have a caddy hanging from my shower head in the tub, and it kept slipping down the pipe it is clamped to.  For awhile I wound tape around it, and the "bump" held the shower caddy in place.  But it was unsightly.  Made a "bump" with the silicone adhesive, and the caddy stays in place just fine, it isn't unsightly, and the caddy can be easily removed to clean it.