FatMat Self-Adhesive Rattletrap Sound Deadener Bulk Pack with Install Kit - 50 Sq Ft x 80 mil Thick

The more I use this product the more I like it. I have developed some opinions surrounding this product & topic and here they are, again only my opinion based on my research and limited experience.1. The FatMat is slightly more difficult to install (correctly) than the Dynamat Extreme. (the only other similar product I've used)2. This FatMat product is 80mil and $2.20 a sq ft, Dynamat E is .67mil and costs $4.16 a sq ft (on date of review)3. FatMat will conform and stick to about any shape but it may take more elbow grease and possibly heat. In some areas I did use a hair dryer.4. If you take your time installing and use both ends of your roller, (the wooden handle end is very useful in the tight recessed and indented areas) you will get excellent results.5. Surface contact is key and surface contact is key, did I mention the importance of surface contact?6. The foil seems thicker on the FM. Just going by feel here, not very scientific.7. Based on the product weight (not shipping weight) currently listed on Amazon, the FatMat weighs in at .46# per sq ft vs the Dynamat E at .36# per sq ft. This could be good or bad depending on your view.8. Personally i think the extra mass of the FatMat is a bonus. Another product used for sound deadening is actually called Mass Loaded Vinyl or MLV. Its probably right above your feet on your vehicles firewall already. I know the theory is for the dampener (fatmat) to reduce vibration and the MLV with a decoupler (commonly foam) to stop airborne sound. Ive also heard people say you dont need much coverage with the dampener and while that may be truth for stopping vibrations when installed with 100% coverage I think it does more than that. Personally I went with about 75% coverage on the inside of the doors (outer skin) and 100% coverage just under the door panel. I then spray glued felt on the backside of my thin door panels before reattaching them. On the entire floor and wheel wells I went one layer 100% coverage followed by continuous layer of luxury liner pro befor carpet. In the rear cargo area I also added 1/8" thick MLV on top of the factory carpet pad but under the carpet.9. Lastly I need to mention I was impressed by FatMats customer service. After ordering I emailed to see if there was anyway I could ensure shipment earlier. I received a response very quickly letting me know they would ship immediately and I would have it when i needed it. Very responsive. I emailed back thanking them and they emailed me back with a "you're welcome". Its the small things.

I have a 2012 Subaru WRX (hatchback) and installed FatMat inside my door panels this weekend. I found it a simple process, after watching a couple of videos on YouTube. I have zero complaints about the product whatsoever. It is easily cut with a razor knife and doesn't require that much pressure to get a good "stick" on the panels. I didn't break my roller, but didn't use it much. Mostly, I just pressed down with my hands or the handle of a screwdriver. There was an odor when I opened the box, but after reading the other reviews, I removed the material completely from the box and left it out for a couple of days. It dissipated during that time and I didn't really notice it during the install.I simply can't believe the difference this dampening material has made. Holy moly! Before installation, I measured road noise inside the car with a downloaded decibel meter app. At 70mph on the interstate, I had 63 decibels inside the car, measured in between the front seats. After installation, on the same stretch of road and at the same speed, I had 57-58 decibels. That translates into a dramatic change from the ear's perspective. And that's only after putting this stuff in the two front doors! I'll be doing the back two doors soon, and hope to knock out another decibel or two. I think there'll be plenty of FatMat material to do both back doors with some left over.While I'm not an audiophile, even I could tell improvement in the sound from my stereo (stock head unit and speakers, but aftermarket amp and woofer). The range of sound can be much easier appreciated. Before this, I had considered upgrading the stock head unit, but now I think I'll wait a while! I would advise anyone to install this material before spending any money on the radio...even if you choose to upgrade, you'll get more bang for your buck with the dampening installed. Highly recommend!

I purchased one 25 sq. ft. kit for my Prius C doors.I was able to apply 1/2 to 1 sq. ft. inside each of the doors (to the inside of the outer door skin, mostly behind speaker location and lower panel edge) and I still had enough to completely cover the area under the interior panels.1 kit should be able to cover 4 doors on a larger vehicle if you didn't install to inside of the outer-door skin.I also sprayed the inside of the outer-skins with a rubberized spray. I have maybe 1 sq. ft. left over to use in the hatch, where I plan to make a built-in sub cab.The stock Prius C doors resonate like a flicked beer can when you close them.. especially the rear doors. There's also quite a bit of road noise evident inside the cabin.Between the rubberized spray (the stuff they advertise on TV) and the FatMat, the doors now sound like my Infiniti M35 when I give them a firm close. The difference is obvious. The spray got rid of the higher-frequency 'ping' and the FatMat added a solid 'thunk' to the door.Everything on the Prius is as thin as possible so it's impossible to completely deaden the road noise with just some Mat on the doors. Even the glass is thin. It's immediately obvious that the car is much quieter now though. The speakers have better bass response and I've got no rattle.It was a lot of prep-work (moving cables, screwing in Aluminum mesh to cover the open areas of the door) but Mat application is pretty easy.FatMat did exactly what it is supposed to do, and it's a lot cheaper than Dyna-mat.Adhesion seems very good but I'll know for sure next year when I go back to replace more of the stock speaker wire (rear doors) for an amp install. Right now, I'm running PolkMMs but with the stock head unit.