B-Quiet Ultimate The Best Viscoelastic Sound Deadener 12 Sq. Ft. B-Quiet Ultimate is a viscoelastic deadener with a supercharged butyl based adhesive. With an aluminum constraining layer and an unique composition with suspended mineral particles it has been proven to be extremely efficient at the conversion of vibration to thermal energy. B-Quiet Ultimate is extremely flexible which is very important as it allows it to properly adhere to a contoured panel. B-Quiet Ultimate is 1.6mm (60mil) thick, weighs 0.35 lb/sq. ft. comes in 1 foot wide rolls and is available in 2 sizes - 12 and 50 sq. ft. rolls It can be installed anywhere including under hood. Highly effective at a very reasonable price makes B-Quiet Ultimate the choice of many competitors.