Another thing that will cut down a lot of road noise would be to stuff the underdash with acoustic foam or wadding, and then create a panel to close the bottom of the dash off from the footwell. It certainly helped a bit on mine.
As for the sheet vs sludge, use both, sheet first where you can, then coat the hole lot in sludge, use it as underseal, from what i remember it will spray ok from a shultz gun too.
|