Apply over Silent Coat Deadening for best results. Specifications: 4 x Sheets of Silent Coat Deadening. 4 x Sheets of Silent Coat Deadening (375 x 250 mm each). Sound Deadening. Double Din. TheNoise Isolator is used on the speaker baffle and door panel to create a rattle free airtight seal to the door card and the the Sound Absorber is used to used behind your speakers to absorb soundwaves 30-40% more than on a plain material.
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