The Rtom Moongel Damper Pads Clear is indeed a great idea. It works well for the intended purpose (not as effective as ring dampers to kill harmonics, but they do enough and offer a greater variety of dampening levels than a ring).
They are really sticky and remain on the intended place even after several uses on different inclined drums played with great fury!
The pads are a bit smelly (chemical "plastic" smell) at the beginning, but it is nothing serious.
All in all, they are great to have in gigs, available for any emergency.