i tried sound deadening years ago and i felt that it was the biggest waste of time. in hot weather, shit runs since its tar based and makes a mess. the foil gets scratched and then you have tar everywhere. its like tar and feathering your car, its horrible.
nowadays, if im going to do any sound deadening i will look for something that bonds and cures, similar to an undercoating. i will also rely on insulation to help cancel the unwanted noise.
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