Deck lid rattles bigtime

I buddy of mine and I used expanding foam in alot of car panels to quiet the rattles from within The biggest thing is getting it in to where you need it. several small holes were drilled "carefully" and we installed the foam. Worked great and no rattles. littl black plastic fill plugs patched the holes. I never considered the "moisture" factor.... but I do know it stops the rattle. As stated above though... a little shot goes a long ways !!

-RPM