How to stop nasty back deck rattle

[AJ32]

Hey guys, not sure if this is the right place for this thread but here goes...

I wondered if anyone has had any experience stopping back deck rattle? I just put in my 2 brand new Dcons in a box build by Pro-Rabbit and this thing slams, but absolutely abuses my back deck. I bought a roll of FatMat but I have my doubts that it will reduce the rattle to where I want it (considering I dynamatted my whole trunk and my spoiler still rattles like crazy). Anyone have any suggestions?

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[LosIsATool 5,000+ posts]

Hushmat does pretty good

 

[Jd377 10+ year member]

Sound deadener showdown ftw! They even send free samples of their product first if you email! Quick shipping too. Works amazing.

 

[SPLaudio 5,000+ posts]

fat mat works pretty well but use a layer of under carpet foam between the rear deck and the cover. you can get at lowes cheap...

 

[roarzorz 10+ year member]

Deadener, foam, glue, screws, tape, etc. Find the part that's moving and stop it. Ain't rocket science.

 

[i2ain2thunder 10+ year member]

^^^^this, but I would like to add that I stopped my nasty rear deck rattle with fatmat 60mil alone. Coated the whole dang thing in it and tons of layers on the rattle spots. If you have a seatbelt mounted on the rear deck those tend to rattle there is usually a bunch of sheet metal surrounding the device and that tends to rattle like crazy. Just find the exact spots I just banged on the whole deck with my fist before putting any matt down and determined exactly where the rattles were comming from and just slapped as much fatmat down as I could to deaden it. Worked well I no longer have any rattle from reardeck. I still got rattle from my rearbumper somewhere and can't do anything about it right now, but it only rattles when I have system at full blast. Really sounds legit though if you have deadener it should be all you need just take your time and clean out your entire trunk/reardeck of any debris as debri is the worst for rattle.

 

[TheUnderFighter 10+ year member]

Deadener is a good place to start, closed cell foam is a good place to end. monstrous amounts of deadener can do the trick, but just a little bit of CCF on top of a layer of deadener should solve it as well.

 

[AJ32]

fat mat works pretty well but use a layer of under carpet foam between the rear deck and the cover. you can get at lowes cheap...

I got some of that stuff, I wasnt sure if it would be too think and not let it button back down but ill try fatmatting it then see if it buttons down with the undercarpet foam.