Is Fatmat Sound Deadener Any Good?

[85 Cutlass Brougham]

As with so many things on my Cutlass, I am doing research now to see what works the best for the least cash. I want to Dynamat my whole interior, but that's pricey and I can't afford it. I have seen Fatmat on Ebay for quite a while now, and it is pretty cheap with enough to do my interior for around $130 shipped. Question is, is it any good and will it just peel off over time? The other cheap stuff I got on Ebay for my truck has peeled in places and I don't want this on the Cutlass. In addition to the Dyanmat type product, I also plan on using the normal jute type insulation that came with the car when new. This will be done in all new products as to avoid the "old car smell" so many cars seem to have from mold, etc. that accumulates over time.

This is NOT a race car, and yes I do know it will add weight. It is meant to be a good "all-rounder" when it is done, so I don't mind the weight too much. It will have almost 1,000 watts of audio through 8 drivers and I want it to sound good. ( 2 10's, 2 6x9's, 2 5.25 mids in the doors and tweeters in the dash)

 

[86CLCruiser]

i typically use the good undercoating. Its like $6 a can and you can get in alot more places. A little more prep work but i have done it in a few of the show and SQ cars i have done with great results. If you go this rout or atleast research it, there are some undercoatings that are labled as sound deadeners, thats what you wanna use since they harden a little bit more than typical undercoating. I use the same stuff when i build sub boxes at work, deadenes the MDF even more and guarentees a good seal.

 

[85 Cutlass Brougham]

I don't really want to use a spray-in type of material, I want to use something that comes in sheets. I may use truck bedliner coating on the floor though, for corrosion resistance.

 

[86CLCruiser]

I don't really want to use a spray-in type of material, I want to use something that comes in sheets. I may use truck bedliner coating on the floor though, for corrosion resistance.

can i ask why you dont wanna use the spray? If you would rather use sheets, i have found the best in my opinion would be accumat by select products, but i just checked their site and cant find it on there

 

[85 Cutlass Brougham]

Sheets are easier to remove if I want to at a later date. Plus, I can use it to cover holes in the structure where GM did when the car was new, but that are missing now.

 

[86CLCruiser]

good reason. You could still use the spray in the doors and on the inside of the exterior panels where you can see them, no need to remove anything from in there. I called another installer that i work with every once in a while, he said the fatmat isnt bad at all for the price. He recomended the use of a good heatgun when installing, and also said to use a light coat of spray glue on the back to help with adhesion

 

[Represent316]

http://www.sounddeadenershowdown.com/ 😀

 

[Bumpin1ohmSS]

I used Fatmat years ago when it first came out in my 02 Jetta. Held up through the summer months like a champ!! I used all Dynamat extreme in my Monte SS to see if there was any real difference between the two. The fat mat has started to break down and melt a lil bit in some spots.(it has been in my jetta since 2002 tho.) Did what it was supposed to do as far as keeping rattling way down and even helped with squeeks and vibrations from my noisy Jetta. Now for my Monte, I was curious to see if there would be a HUGE difference in quality. The Dmat xtreme was a lot tackier than fatmat and it conformed to tight spots alot better. (corners and such) I have not seen any melting from the Dmat xtreme. I laid it down in 04. If I had it to do over, I would go with the Fat mat. Works just as good AND you save a ton. I'm pretty sure they have addressed the tackyness prob by now. I just gave a HUGE roll of it away last week. I would have gladly sent it too you. I'll see if I can get a sheet from my bro if you like(and send it for you to "try before you buy").

Believe me..Dmat xtreme can get pretty darn expensive. These pics represent 8 boxes of Xtreme at $240 a pop!!

CLICK PIC FOR MORE PHOTOS



Hope this helps ya...

Warren 8)

 

[jonnyslick]

So you did the entire car with 8 boxes? And how much quiter is it? Does it end up quite like a BMW or Caddy?

 

[Bumpin1ohmSS]

Yes. The entire inside of the car. When done, you could not see any metal in the cars cabin. I had a little bit left over to do the trunk lid. I used some fat mat to finish the trunk off tho. Didnt want to spend anymore loot, and I had 200sqft of fatmat left over from my other car. Quieted things down a lot. Of course a 20 somethin year old car with bad weather striping isnt gonna be as quiet as a lex, but it did what I needed it to do. I was running Flowmaster 40's, and could hear/feel em pretty good before the Dmat. Road noise from my 30 series Z rated tires was another prob before the Dmat. Cant "feel" the road as much now. No rattles at all. I mainly did it because of my sub. Its tuned at 27hz and thumps hard. Even regular radio commercials vibrated and rattled the hell out of it. No prob with that now...

I would have gotten the same results from fatmat. I'll go that route when I build my next SS Monte or Elco...

Warren