Without proper application none of them will do any good . Alot of sound deadening is in the prep work and application of said sound deadener. Stopping rattles i.e. metal to metal , or plastic to metal is all just a matter of finding what's hitting together and making it stop. Either with deadener, insulite, jute, or simply tightening down bolts and nuts //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif