Quote:
Originally Posted by ChrisSlicks
I think the spray on stuff is mostly to stop the panel from vibrating (deadening), don't think it has huge insulating properties.
I think Dynomat on the interior would work better, it's really heavy and dense and a good sound insulator. It will hurt performance slightly though if you go adding 100 pounds of it.
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I just did it this weekend. I took everything out of the trunk and covered as much metal as possible (including the wheel humps, front and back) and didn't notice any difference at all.
Most of the sound insulation actually seems to come from just putting the mats in the back.
The next thing I was thinking would probably be easier and better is just more of the 3/4" or so thick insulation/matting that seems to be under the passenger compartment. It may not PREVENT noise, but it may do a good job of absorbing some of it...