This saves weight, material cost and installation time.
12-1/2 x 24 (4mm) - 4. ;First choice of the industries top custom car builders, restoration experts and luxury car OE Manufacturers..2 sq ft;Industry leading 4mm thick asphalt free, pure butyl, noise constraining layer to remove the harshest of low frequency noises ;Extra thick 4 mil aluminum stiffening top skin to keep interior panels from flexing and generating noise;Worry-free no sag adhesion to any interior surface, vertical or overhead, even in the most demanding temperature extremes.