I spent the last week installing Dynamat Xtreme. I bought a package of 36 square feet for about $98 plus another $36 shipping and when UPS delivered it another $86 taxes and delivery again.
I found 36 square feet not quit enough for the interior and nothing for the doors.
I am installing new floor mats and want to get the rear installed so I can bolt in the back half of the cage. The cage is done, powdercoated black and just waiting to go in.
I need another 4 sheets of dynamat in 18 x 32 inches, 3 for the doors and one for the councel.
It total about 50 square feet is needed to cover everything except the Tee roof. I might even get another sheet and do them.
I am really trying to quiet the car down. I hate noise but refuse to give up my 3 inch exhaust.
This is the interior nearly finished. I have to wait until Monday to get more sheets.
You can also see the stero mounted here. I use a remote and bounce it off the windshield.
It is alot of work, takes at least a 1/2 hour per sheet and you have to really roll it out, I used a small plastic hammer and worked every inch of it working out all air pockets, making sure the edge and every other square inch is down so it works properly and sticks.
It is nice stuff to work with and you just peel the brown paper off the back and install, It sticks really well.

 

I COMPLETELY understand the amount of work involved in this. I did it this spring. My fingers hurt like hell the next day. I think I used 12 sheets.
Did you do inside the rear compartment?

 

You did a neeter job then I did. Your wheel wells are smoother. The 9 sheets didn't quit finish the interior. Did you do the inside of the doors??
I did not do the 3 compartments. One of the boxes is sealed for my base in the stero.
I am installing the new carpet. Do you glue parts of it down?
Next week I will get 4 more sheets and do the doors, maybe even the Tee roofs. My son uses the stuff in his plant and will bring me the extra sheets when he goes back after the christmas break. Like me he is off these 2 weeks.

 

looking good.......

 

Is there a bad oder that dynamat puts out while doing the install.
I thought about using BROWN BREAD the company told me they
are the same as dynamat but cheaper because of the name.
CGGorman, did it cut a lot of noise out for you? I am confused on which
one to use.

http://www.b-quiet.com/

 

I'm wondering if I shouldn't have used something different. My car runs a WHOLE LOT cooler inside, but I used Reflectix. All the heat problem went away but the noise is still there ... ... ... ...

 

There is absolutely NO odor with dynamat. It is easy to work with just slow, you have to make sure of complete contact with the surface.
Ebay has lots of it for sale at about $94 or 8 plus shipping.
This is the xtreme. I would have bought brown paper if I could have found a deal on it.
My son uses a no name that is identical to my dynamat.

 

I paid about 1/2 of what they are asking for dynamat on that web site. 36 square feet is not enough but does most of the interior.
I feel the doors need to be done since they are one of the maximum contributors to noise and often overlooked.

 

Thats why I did not go for reflectix, I want to drown everybit
of noise I can. I will even pull the dash, when I do this, I am
also going to glass over the trap door for the A/C to cut noise
coming from there,

 

BROWN PAPER or BROWN BREAD?

 

am
also going to glass over the trap door for the A/C to cut noise
coming from there,

You just gave me another idea. Thanks.

 

I mean brown bread. Did you notice a signicant difference after installing the dynamat????

 

I have not used anything yet LOL, I not sure what to get
I want to really know if dynamat really kills noise and heat.
Lots of products are just for heat, and claim noise to.

 

I think closed cabin is the way to go.
All the aftermarket a/c kits are closed cabin,
the trap door is a big problem even when working
correctly, because at speeds over 50 miles an hour
the trap door slightly open's letting warm air in. So why
not make a factory unit closed cabin also

 

I installed mine prior to ever driving the car, so I can't comment on effectiveness. I know several people in the car and home audio cirle and they all swear by Dynamat.

I did NOT do the doors, but I DID do everything else I could reach. I'll get the doors this summer when I pull the panels to align the windows and install the soft top.

I used an Al Knoch carpet kit and only glued two places: the top of the rearmost bulkhead (directly above your rear courtesy lamp in a coupe) and the top 4" front and rear of the center bulkhead (the steel panel directly behind the seats.) I used a DAP contact cement rated for outdoor use, I think. Stuck real good and was easty to apply with a $1 paint brush.

I put Reflectix on top of the Dynamat so I don't have any worries about heat or noise.

Ironically, I have JetHot sidepipes so heat isn't a problem and all the noise comes right in regardless...I tell myself it was worth it...and it probably was.

That's a heck of a price, Norval. Snap it as fast as you can at those prices...

 

OK Guys....thanks, as I will be doing this soon. I was going to use Reflectex to keep out heat and just assumed it would quiet things down. I'm getting an education here. Dynamat and Brown Bread work for reducing sound, but no mention of acting as a heat barrier. What to use for both sound and heat reduction? Sorry....guess I type too slow, MEGLADON beat me on the heat issue.

 

On the site with the BROWN BREAD it show the heat index,
it was pretty impressive, both are real good for heat, I notice
in all the car shows they show on TV, even in cars on the back-
ground are fitted with dynamat. But if BROWN BREAD is just as
good with Its cheaper, I am scared to buy from e-bay, Never
know who to trust

 

That's a heck of a price, Norval. Snap it as fast as you can at those prices...

There is lots of the stuff on ebay. Someone has alot of it. I was wrong on the price. It came to about $132 AM total including shipping. The $86 dollars shipping was for my new carpet.
The guy on ebay was great, I gave him a negative rating because I couldn't get ahold of him to ask where my dynamat was after a month. He wouldn't respond to my emails but the next day after giving him a negative feedback the product was at my door. I would gladly deal with him again.
For guys in the states shipping was only $12. So for about $110 American you can get 36 square feet of the Xtreme. Well worth it.
The doors are very important if you believe the instructions. They will be done soon but the carpet is my priority because I want to install the cage.

 

the Reflectix works great as a heat barrier and will quite things down too. It would work better for noise reduction if it had a little more mass and was adhesive backed. Some people glue it down and get better noise reduction performance. If heat is more the problem, then it's perfect for the chore.

I used a Dynamat lightweight "clone". It was sold by Cascade at one time but they moved into heavier products. It can still be purchased at Home Improvement stopres as a heat-duct wrap... called Frost King. Dense foam, adhesive backed on one side - foil backed on the other. 1/8" thick makes the carpeting lay back down easily.

Here are pics of the wifes 1973 with the Frost King installed:


we removed the seats as well and applied it there.

if money and/or weight is a concern then the Frost King will work well.
But the Dynamat Extreme will work better if neither of these are a concern.

my C5 Frost King web page:
http://mikemercury.home.att.net/sound.htm

 

"Dynamat lightweight clone" I thought Dynamat / Brown Bread products were a tar backed thick aluminum composition that absorbs vibration.

The foil backed adhesive foam insulation is totally different animal and would work well in conjunction with the Dynamat tho.I plan on both.

Weight is my question of the Dynamat. How much does the package of, what was it, 36 square feet weigh? My car is Pro-Touring so it is not going to be a big factor at all, just curious.

As for my major HEAT address, I plan on Jet Hot Coatings for the pipes under the cockpit area to contain the heat until it reaches the rear. Jim