I have used it (or similar products) inside the chassis and covers of electronic boxes so they no longer sound like telephones - ring, ring! Especially good for the really flimsy metal and plastic - cheap (oops, inexpensive) CD & DVD players, amps, etc. Even TVs!
Never have tried on stands or bottoms of equipment - watch for ventilation requirements.
Never have tried on stands or bottoms of equipment - watch for ventilation requirements.