Accessories

My doors go "kfump" now, instead of "klang"
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!

Luxury and comfort in a box
I have to admit that I was a bit skeptical at first, but I am now a believer.

To begin with, if you look at the trend of reviews on Dynamat, it tends to show that people are either completely satisfied (5 stars) or unsatisfied (1 star). I suspect that those who are giving one star ratings either don't know how to properly install the product or they just expect miracles.

I have a '07 Camry which I love but roadnoise has been getting to my sensitive hearing lately. *NOTE: I have a leather interior which lends to a louder interior when compared to an upholstered interior. My biggest problem was music listening when driving on long hauls over roads that are rough. I would have to crank up the radio to hear it, and it was not even intelligible at that. With this bulk kit, I was able to line nearly my entire trunk, the rear speaker decklid, and the floorboard beneath the rear seat where the gastank sits. The results are phenomenal!

I am not prepared to tear out my entire interior to do the ceiling and floorboards and firewall, but beware it is a lot of work. With having prior knowledge of how to tear down my car, it took me 8 hours to completion for the rear of my car. Seriously consider taking your time to install it, and do it the right way.

If you do a rush job, you will have a rushed-job results and you won't be happy. You have to prep the surface which is just fine with a can of Denatured Alcohol and a white rag. It is imperative that you roll this substance on real good. The performance of this product depends on how you tack it to the surface. The more contact it has with the surface (ribs and creases and all) the better it will perform. I highly recommend the rubber hand tool as it conforms easier to bends in the metal making it easier to form. I suspect the wooden tool would do just fine, but it may be harder since it doesn't have any "give" to it for forming those tough spots.

I am very happy with my results. Without doing the whole car, I have cut my road noise in half literally. I notice no roadnoise from the rear now, it's all from the doors and front, etc. but I am not prepared to tear out my interior. The stock speakers in the car perform 200% better, although they still suck. Before the application I wasnt able to turn up the volume without losing the bass completely. Now I have decent full-range sound and I no longer have to turn up the radio to hear it. I used to turn up the volume to 26-30 just to hear it (which I still couldn't understand because of the noise). Now, I leave it at around 15 and never have to turn it up to hear it or even understand the music! No joke.

One last note on installation: if you aren't worried about the look of the install (because it is going to be covered with carpet, etc.) don't be afraid to cut it up. You will more than likely use every piece. It is much easier to work with in strips. Large curves are a son-of-a-gun. The product is very thin, but very tough. AVOID AIR POCKETS!

Waste of Money
I started with the speaker packs. I saw very little result. Then dynamat said, well you really need to do the whole door, so I did. $400 later, I still have as much road noise as before and I covered my entire door frame on all 4 doors.

Don't buy in to the hype.

Rattles are for babies
This has a lot of uses beyond car applications. I used a sheet of it on the drywall behind in-wall speakers to cut the amount of sound radiating through the back wall and tighten the sound. I used a sheet of it inside a computer case, to eliminate a tinny rattle that came from the case vibration while it was on. You can even put pieces of it on the inside of washing machine or dryer panels to make them quieter.

It does have one drawback, and that's the fact that once you stick it on something, you will not be able to get it off without making a big mess. It is essentially tar with a foil outer cover, and trying to get it off just leaves a bunch of sticky tar behind. So, choose the place you want it carefully before sticking it down!

Item as advertised.
Have worked with Dynamat many times since its introduction in the 90's and it never fails to deliver. These boxes were installed in a '51 Buick sled with the customer being happy. "It makes the car feel extremely solid" and the audio portion of the work is still not complete. Thank you.