Fatmat or Dynamat, How much do I need to buy? Options

[VaccaRabite]

I want to do my cabin. Floors, interior firewall. Not planning on doing doors.

I'll use either Fatmat or Dynamat, but I don't know how much to buy.

Which of the two do people like best these days.

Zach

[turnaround89]

If you want your car to be dead silent, dynamat is what you would want. This is coming from my experience from using dynamat in a 71 vw bug. I have never used fatmat but i have used edead, which is a heck of a lot cheaper than dynamat and does the exact same thing. Dynamat is really thick stuff, so you will add a lot of weight to the car but will do more than edead since it is thicker. I plan on edead since i have some left over, or just leave the stock stuff in the car. But if you want the car totally silent, i would suggest dynamat.

On ebay you can buy a box of dynamat that has like 36 sq ft in the box. That covered the entire inside of my doors, the rear luggage shelf and then some further forward in my vw, also the inside the rear quarter panels, and i still have one sheet left over plus some scraps.
here are some pictures, i hope this helps.
Here you can see the dynamat covering the inside of both doors
(IMG:http://i268.photobucket.com/albums/jj2/aheimer89/SG105307.jpg)
(IMG:http://i268.photobucket.com/albums/jj2/aheimer89/SG105602.jpg)
(IMG:http://i268.photobucket.com/albums/jj2/aheimer89/SG105614.jpg)
Here is what i ended up with coverage wise with one sheet still left over. You can see the dynamat on the inside of the rear quarter panel.
(IMG:http://i268.photobucket.com/albums/jj2/aheimer89/SG105309.jpg)

[boxstr]

I would use fatmat, it is better priced than Dynamat and it works just as well if not better. I have used Dynamat and it works great but is expensive. They sell only in either small batches or large batches.I do not know what edead is???
CCLINSHHHHH

[orange914]

i've heard there is a commonly sold material sold in harware stores that used under roofing in snowy areas. it is supposed to be way cheaper?? and very simular to dynamat

[VaccaRabite]

How much do I need to do the cab of my car, though?

I don't want to buy more then I have to. If 36 sq feet covered a bug interior, that should also do a 914 right?

Zach

[blitZ]

I bought the FatMat bulk pack, I think it was 50 sq ft. There was enough to do my floor and interior/exterior fire wall. If you just wanted to do the interior, I believe 36 sq ft would be enough.

[SLKWrx]

You could also check out Raamat. Its cheaper and just as good

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

[VaccaRabite]

Wow. Here is a killer site for sound deadening comparison!

http://www.sounddeadenershowdown.com/products/

Fatmat is one of the worst products tested. It had nearly earliest failure on every test.

Looks like RAAMmat is the best option if you don't want to spent a ton of cash.

Zach

[So.Cal.914]

I noticed that RAAMmat is butyl rubber. Now this may be obvious and I am just

catching up But is not the whole point of removing the old sound material because

it became brittle, cracked and allowed water to get between it and the metal.

Causing Rust.

What is going to keep the same thing from happening under this butyl based

sound proofing? (IMG:style_emoticons/default/confused24.gif)

[PRS914-6]

I have never personally tried it but I hear that there is a cheaper solution....way cheaper. You can buy a roll of roof repair sheeting. It's about 12" wide, is designed to go under composition shingles to patch holes in the plywood, is adhesive backed and dense with similar composition to the deadening materials. I have one friend who tried it and said it was a big improvement at a fraction of the price. YMMV

Here is the type material I am talking about

[azbill]

I used B-Quite it is less then half the price of Dynamat and has better performance. Check it out.

Bill

[turnaround89]

A lot of people talk about using peel n seal, the roofing material you can buy at lowes, home depot, etc. I have never heard of anyone claiming how well it works, but its worth a shot if you trying for a budget. But then you could just buy edead which is as cheap as peel n seal, and designed to be put in automobiles.

[mstein95]

I used 3 Dynamat Xtreme Wedge Paks (12 sqft) to cover the back firewall if that helps in estimating how much you need.

[VaccaRabite]

Butyl is supposed to be the way to go these days.

According to the site is posted that did testing, the asphault based products fail (ie - fall off your car) if it gets too hot or cold.

What surprised me is that FatMat, which gets a LOT of praise here, got really slammed in the reviews.

Testing was not done to see how the Butyl products stand the test of time. The implication is that they will last longer then asphault based products.

Peel and seal was mentioned in the testing. Appearently, FatMat is very similar to peel and seal.

Zach
Zach

[michaelt55]

Butyl is supposed to be the way to go these days.

According to the site is posted that did testing, the asphault based products fail (ie - fall off your car) if it gets too hot or cold.

What surprised me is that FatMat, which gets a LOT of praise here, got really slammed in the reviews.

Testing was not done to see how the Butyl products stand the test of time. The implication is that they will last longer then asphault based products.

Peel and seal was mentioned in the testing. Appearently, FatMat is very similar to peel and seal.

Zach
Zach

I have been thinking about this also...tell me which you way you decide to go and how it works for you. I be very interested in the results..


Michael

[VaccaRabite]

Butyl is supposed to be the way to go these days.

According to the site is posted that did testing, the asphault based products fail (ie - fall off your car) if it gets too hot or cold.

What surprised me is that FatMat, which gets a LOT of praise here, got really slammed in the reviews.

Testing was not done to see how the Butyl products stand the test of time. The implication is that they will last longer then asphault based products.

Peel and seal was mentioned in the testing. Appearently, FatMat is very similar to peel and seal.

Zach
Zach

I have been thinking about this also...tell me which you way you decide to go and how it works for you. I be very interested in the results..


Michael

I bought RAAMmat. It is sold in 62 sqft rolls. I should have enough for my 914 and maybe enough to do the cab of my m715. I will bump the thread once I see how things work out.

Zach

[djm914-6]

I have been thinking about this also...tell me which you way you decide to go and how it works for you. I be very interested in the results..
Michael

Me too. Does anyone have any photos of a 914 done up?

Since I'm working on getting my interior back into place (and other stuff) I'm rethinking the 'lighter is better' bit and may go with 'quiet is nice' instead.

[melnyk]

i've heard there is a commonly sold material sold in harware stores that used under roofing in snowy areas. it is supposed to be way cheaper?? and very simular to dynamat

its called ice shield. after i do my floor pans i plan on putting this stuff on inplace of that tar carp they have on

[melnyk]

oh btw my neighbor works at the factory where they make this so i get it cheap. if it works im thinking about making pre cut pieces...

[VaccaRabite]

oh btw my neighbor works at the factory where they make this so i get it cheap. if it works im thinking about making pre cut pieces...

Is it asphault based? If it is roofing material, then it probably is.

If so, you might want to rethink it. All the better soundproofing is going away from asphault due to its failure rate. If your car sits in the summer sun, your solution may melt and come off the car.

Zach