Anyone got any reccomendations for a spray foam for sound insulation? I got some dynamat already but im also looking for a spray foam to fill in those cracks and larger spaces
What the properties of the polyfill that makes it attractive for this purpose besides it's price?? I'm looking at polyfill alternatives, that's why I'm asking.or use polyfiberfil (pillow stuffing) and fill up the empty panels. Stay foam is really messing but more dense, where as polyfil is cheap and easy to work with. I personally foamed areas I couldn't reach into, and I polyfilled all the big cavities like the rear fenders and hatch door. http://www.subaruforester.org/vbulletin/f77/project-quiet-car-28591/
I wouldn't recommend doing the doors with hollow fiber either because water gets in via the windows and drains out the bottom through drain holes, often sitting there for a while, but if your rear wings and tailgate are letting water in or retaining it, you have bigger problems to deal with before sound proofing/deadening. The EU Foz has the radio antenna incorporated into the passenger side rear cargo window so no ingress of water from electric ariels there either. The doors are a more complicated issue I think requiring re-mounting the speakers as well as damping the outer and inner skin with something like Dynamat?Sound X/Raamaudio products. The gap between the inner skin and the back of the door trim should be free from water because of the plastic membrane so I guess hollow fiber could be used in this space too. If however, money is not an issue, just Dynamat/Raamaudio the whole thing. Unfortunately a lot of the cool sound products mentioned aren't available here or are too costly to import. I just like Sea Scoobies practical approach for those of us who maybe don't have the money for the listed products (some members mentioned overall cost of $550+ for materials?)I would steer clear of anything that will retain water. Cavities along exterior panels and especially in doors can have moisture and condensation - leading to mold.
I just deadened the side doors on my 2010 forester. I used a combination of Hushmat adhesive panels from local shop (toronto) and ensolite (ordered from raamaudio). I was quite a job but the results are impressive - especially for midbass sound from door speakers (I also installed new stereo).
The ensolite can be rolled up and stuffed into cavities. I also draped several layers under the spare tire in trunk. As well, I hung 'curtains' of the ensolite behind door cards before re-attaching door cards. Rick at raamaudio even sells an aircraft grade spray adhesive that is perfect for attaching the ensolite to steel surfaces.
Hope this helps.
Do you have any pics or your installation or at least of the new stereo? I would love to see what it looks like since I want to put a new stereo in my 10. Most cars here are 1st or 2nd gens and I want to see the 3rd gen with an aftermarket stereo since my imagination isn't that great!(I also installed new stereo).