Thoughts on sound deadening material

[Larsv8]

I am about to redo the interior in my camaro and the option arose of whether or not to get "mass backing" on the carpet. Mass Back Carpet - Massback auto carpet - OEM Auto Carpet Thoughts on this? Or perhaps another product like dynamat? Thanks!

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[JP95ZM6]

I would rather put any damping material directly on the metal, so it is adhesive bonded and can add mechanical damping to the noise source. I suspect the results would be much better this way, but I have no data or references to back that up. Dynamat is great, but expensive.

If cost is a concern: I used a roll of premium Ice Guard roofing material in my Saab and had great results on horizontal surfaces, pretty good results on vertical. I just had a door skin off, and a little bit of the vertical had pulled away, so I can't recommend it for vertical surfaces. In the tire well, mostly horizontal, it's holding up perfectly after a couple of years. Almost $100 for a roll, REALLY sticky adhesive, and more than enough for a car even with multiple layers in some areas. I don't remember the brand, but it doesn't have much smell if any. Came from Lowes or HD.

[CatsTasteGood]

What do you want to do? Do you want to control vibration or block noise? Dynamat is to control vibration which can create noise. If you want to block it you want to use Mass Loaded Vinyl (MLV).

I used some of this in my Z because that car screams when driving over concrete. 4 ft. x 25 ft. Flooring Acoustical Underlayment-DB448X25IBX at The Home Depot
It isn't as thick as a lot of the stuff on the market but it is easier to get and doesn't weigh as much.

If you really want to make the car sound proof you put dynamat (or similar) on each panel, a layer of foam, then the MLV.

[jy211]

LizardSkin® Spray-On Insulation : Lizardskin

[Tokuzumi]

The corvette guys swear by Frost King stick on duct insulation. It's a little more than 1/8" thick, and is about $20/roll, and covers about 15 sq ft.

Shop Frost King Foam Duct Insulation at Lowes.com

[mdenz3]

I think it is heavy and belongs in the trash.

[Sparkz28ss]

Originally Posted by mdenz3

I think it is heavy and belongs in the trash.

This...



But if you need something try Sound Deadener Products FatMat Dynamat Xtreme Alternative or www.edeadsounddeadening.com fatmat is great stuff and cost less the dynamat...edead smells funny to me but I know a lot of people that use it and love it

[Blue89Bird]

Originally Posted by jy211

LizardSkin® Spray-On Insulation : Lizardskin

That's what I'm going to be using on my 68.

[Larsv8]

Well, all I know is that with the current stock setup, it gets really hot around the transmission. Vibrations don't really bother me, but I'd like a quiet comfortable ride if the windows are up.

Is it worth the money to go these routes, or just a waste of time?

[Tokuzumi]

Everyone I've read about that has done this has enjoyed the end result. I plan on wrapping the inside of my firebird in sound deadening material (foil lined) once it's no longer my DD.

[KrisH]

I do most of my cars with QuietRIDE. It's a really well-designed kit that's made specifically for your car. They send you a kit that has a thick padding that goes over a layer of Dynamat. The padding's all cut to fit the car perfectly (in most cases) and I can honestly say it makes a huge difference. They usually include a headliner kit too that helps a lot. The roof of my Mustang was super tinny when you tapped on it, but now it sounds like it's made of thick plastic...if that makes any sense. It's good stuff though.

QuietRide Solutions is their site I believe.

Edit: I didn't know this forum turns URLS into links automatically and renames them now...pretty sweet.

[JP95ZM6]

Originally Posted by CatsTasteGood

What do you want to do? Do you want to control vibration or block noise? Dynamat is to control vibration which can create noise. If you want to block it you want to use Mass Loaded Vinyl (MLV).

I used some of this in my Z because that car screams when driving over concrete. 4 ft. x 25 ft. Flooring Acoustical Underlayment-DB448X25IBX at The Home Depot
It isn't as thick as a lot of the stuff on the market but it is easier to get and doesn't weigh as much.

If you really want to make the car sound proof you put dynamat (or similar) on each panel, a layer of foam, then the MLV.

That is kind of a misstatement of the issue. Noise is vibration, and when the noise is transmitted through a panel, reducing panel vibration reduces the noise accordingly. Believe me, adding the heavy damping material to metal panels kills noise quite well!

[CaliChevyLover]

Just threw out the camaro's nasty old carpet, got some light rust to fix, thinking about just bed lining the floors

[Z28Roxy]

I used fatmat in mine