Boyar 36 sq ft butyl rubber sound deadener
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BUTYL RUBBER SOUND DEADENING
Use this to reduce panel vibration which will reduce road noise, improve sound quality from your audio system, and also keep the car cooler in summer and warmer in winter. This is the first product that most will use to improve older cars by adding anywhere from around 30 to 100 square feet or more depending on how crazy you want to go.
BOYAR butyl rubber sound deadener is one of the thickest available at 2.2mm which is thicker, heavier (more effective), and as good if not better than most of the better known brands which are only around 1.7mm to 2.0mm thick yet cost 2-3 times as much. Boyar is made of black high grade butyl rubber with silver foil and small black logos.
This product comes in a 36 square foot box which has 9 large sheets each 78cm x 48cm.