DBDRAGGUY
10+ year member
CarAudio.com Veteran
Foam inside the support will be best. Just keep in mind your adding mass to the panel that is vibrating. No matter how you do it it is not going to be very pretty. You can buy a roll of ensolite from raamat and a can of spray adhesive after your done to cover the peel and seal. The only difference between peel and seal and dynamat or similiar is the amount of black tar material under the foil. The thickness is greater on the Audio products and that is why they are refered to as better.
