Dynamat installation

[beandip]

Was I ever wrong about the amount , what was I thinking 70 sq ft !!! I just pulled up Mikes gallery pictures and he stated that he used 35 ft. to do the yellow judi's floors and firewall. It is worth a look . Go to gallerys and click on mike and look at the yellow Z . For those that are new here. Gary What I was remembering was the cost I think of about $70.00 for the 35 sq Ft. sorry about the bum info . Gary

[Mike]

Hi Guys,

Thanks for asking me into the thread Gary. Well, as it ends up... I think I purchased around 3 rolls of 10sf. The smarter way to go about doing this is to buy a SINGLE 50sf roll. It's cheaper in the long run if you want to do all parts of your car.

The Brownbread stuff is a lot less expensive than Dynamat and I think it installs easier too. You can see my gallery photos of this project by clicking on the following link:

http://www.classiczcars.com/photopost/showgallery.php?cat=3067

I believe a 50sf roll will do the entire car.

Edit: The link to B-qiet is: http://www.b-quiet.com

-- Mike

[jmark]

I bought the Dynamat door kit today. I'll let you know how it goes.

[Mike]

Around a pound per square foot, not bad and acceptable to me. I have shaved weight in other ways so adding this back for some quiet I figure I'm still ahead of the game both ways.

Holy crap!! That is heavy stuff.

There are three types of noise supression in automobile applications. They are listed as Acoustic Loss Factor, Absorption Coefficients, and Transmission Loss.

I don't know what the test-ratings of your (1lb) product might be, but, you can check out a good comparison of a few products here: http://www.b-quiet.com/compare.html

The B-quiet stuff looks to be about .33 - .35 pounds. You don't get into the full 1-pound until you add the thick products which are applied to the hood, firewall, and other barriers.

I wanted to cover my metal surfaces with the lower-weight product. And, the other heavier products will be applied to my firewall and probably the underside of the hood.

[MAX]

Hey Jmark,

I was reading your 2004 post about using Dynamat and would like to re-open this thread.

So how did that work out for you?

Did you use the Dynamat material on the outer door skin and/or on the inner door under the door panel.

I too am thinking of using Dynamat or equivalent in my Z....But I too am concerned about it holding moisture, especially if used on the outer door skin, and rusting out the door from the inside out....

Do you or anyone else know if it is safe to use one of these materials on the outer door skin where they are susceptable to water from rain or washing?

thanks

[ZIII]

Max...

Am considering doing the same thing to my car.... Came across these folks at Second Skin, thought you might want to give them a look. Several here have spoken highly of these guys, I am debating getting their product but thought I would throw this out just for consideration.

http://www.secondskinaudio.com/cgi-bin/index.cgi

[MAX]

Hey ZIII

thanks for the headsup on the Secondskinaudio place.....these look like some good products..

Their one product called Spectrum, which is sprayed or painted on, may be better for using in water prone areas like the outer door skins. But I'm not to sure about putting the mat type products like the aluminum clad Damplifier stuff there as well....It appears that they recommend putting a coating of the Spectrum on first followed by the other products....I'm just really concerned about moisture getting trapped between the mat and the door skin and causing a rusting problem....

I see that installers also use the mat type of products on the inner door frame just under the vinyl door panel......So that may be the way to go....using the Spectrum right on the outer door skin and the Damplifier product under the vinyl door panel....

they also use the aluminum clad buytl product (Damplifier)for blocking heat as well as sound deadening on the fire wall, and floor.

Then I suppose that Spectrum stuff would be a good first base coat for all sheet metal, whether it is the floor, trunk, firewall, transmission tunnel or side panels, etc......

Stay in touch on this one.....

[Victor Laury]

i've been thinking of trying the "QuietCar" coating. A Five Ten fellow sells it and I liked his demontration - two steel bars, one coated, one not - Hit the uncoated - RINGGGGG, hit the Coated - thud.

http://www.quietcoat.com/index.html

[BD240Z]

I can vouch for the QuietCar. I've used it on an older Porsche and my old 280Z and really liked the results. You apply it with a brush which means you can get it into the nooks, crannies and hard to reach areas for full coverage. After it dries, I top-coated it with some Rustoleum oil based paint.

I wouldn't apply it to an area that will be seen like under the carpets in the cabin. When it dries, it has an uneven, rough surface. I think it can be sprayed but I never looked into it.

My 240Z's getting the full treatment with QuietCar and Evercoats Q-Pads.

Bruce