Dynamat 10455 Xtreme Bulk Pack 9 Sheets

Dynamat extreme (2008-06-04) Rating: 5/5
I drive a Scion TC with after market exhaust. Was looking for something to help cut down road noise and exhaust drone. One box basically covered the floor and inner fenders from the rear shock towers to the back of the car. I'm guessing I'll need 3-4 more boxes to do the entire interior. The stuff works though, with just the back end of my car done, it did quiet down the drone a bit and definitely less road noise coming from the rear of the vehicle. I was careful installing the stuff and only ended up with a couple small scratches, though I can see how so many where able to cut themselves on this stuff. It is very sharp as well as sticky. You will definitely want to wear some sort of work clothes for installing Dynamat. Also I would recommend the roller they sell for installing it, makes it a lot easier to work with.
Dynamat of course!! (2008-05-31) Rating: 5/5
I've used Dynamat for about 20 years now. If you want a quiet, rattle free environment you want this product. Just installed three full boxes in my project car!!!!
Very easy, easier then I expected. (2008-05-31) Rating: 5/5
The 9 sheets included in this kit definitely arent enough to do an entire car if youre going for lots of coverage. I used all 9 sheets on the inside of the trunk of my Cobalt. Cutting them was very easy, I used a razor knife, and put the piece to be cut on top of some cardboard. I was expecting the mastic to gum up the blade quickly, but surprisingly it didnt, even with the dynamat out in the sun as I worked.

Using a roller it stuck well to even strange contours in my trunk.
Works ok, if you have plenty of time (2008-05-21) Rating: 4/5
I used two of the 36 sq ft (total of 72) on my car and hood and used the "hoodliner" (DO NOT WASTE YOUR MONEY ON THE HOODLINER)...but the dynamat actually did some good for road noise. I can say that the hood liner doesn't work well because I put it in about 2 weeks after I installed the first round of dynamat. Looking back, I would still do the dynamat, but would save the money on the hoodliner. Good luck to all, and be prepared to get your hands cut up by this stuff...plus the rubber black stuff gets everywhere (shoes, jeans, hands, knifes,...) just use 90% rubbing alcohal to remove it (works like a charm) :)
My doors go "kfump" now, instead of "klang" (2008-05-14) Rating: 5/5
I agree with the others; anyone who doesn't like this product must have installed it wrong.

I have a 2000 Honda CR-V SE. I lined the underside of the hood, the entire roof, all four doors (inside the doors and the surface), much of the floor, the spare tire well, the rear quarters (inside, behind the rear speakers) and lots of the tailgate with two (2x) Bulk Packs (9 sheets each.) I had not planned to line the roof, but after gutting the seats, all trim panels, and all the carpeting it seemed worthwhile. I cannot explain how differently the vehicle sounds now. EVERYONE compliments it (including my wife, who could not understand why I was spending the time and money on the project in the first place, but now wants me to Dynamat her Solara!) The doors go "kfump". Knocking on the hood, roof, or doors sounds like hitting a solid wood desk. There are NO vibrations or rattles in the car whatsoever (I also got some cheap self-adhesive felt sheets from a hobby store and lined the ashtray, glove box, and little change compartments. Now it's like driving around with ear muffs on. There is still some road noise, because I have pretty knobby tires, but the incredible thing is that I can no longer hear my exhaust from the rear of the car, and sometimes I'll look sideways and notice an 18 wheeler beside me that I did not even hear. When I pass vehicles going the opposite direction I am used to the "whee-owwww" as they go by, but now it is a "whiff", or just silent.

Lining the roof made a huge difference when driving in the rain, but since the windshield is so noisy in a downpour the cabin is still pretty loud, but there is no "ratta-tat-tat" from the metal anymore at all.

I bought a heat gun and the rubber Dynamat roller specifically for this project (though I'm sure I'll get plenty more use out of the heat gun). I agree with many of the other reviewers that if you do not press this stuff down in FIRM contact with your vehicle that you will not get the best results. I've done MUCH (much, much, much, much...) research on this and the bottom line is that this product is so effective because of "vibration damping", NOT sound blocking. If you hold a sheet up in midair between you and a speaker it will have no effect. If you glue it to the speaker you will virtually stop the sound.

I can also go on about how AMAZINGLY different that my stereo sounds, but I think everyone else covered that. Yes; more mid-bass. Yes; you will hear things in your music that you never heard before. Something that surprised me though was how much quieter your music is OUTSIDE your car. I am not a loud person, and I always turn the volume down at stop lights, and in residential neighborhoods, but one time I stepped out of my car and left the stereo on at a pretty comfortable level. When I closed the door I could not hear it at all. Nothing. Nada. That was a nice bonus.

This stuff is incredible when installed right. Amazon had the best prices in all my searches. You will ache, you will probably bleed, but a weekend or two of hard work should reward you for years. Enjoy!