11103 Dynaliner 32" x 54" x 1/2" Thick Self-Adhesive Sound Deadener – Made in USA

I've got an old diesel truck and it's very loud. I thoroughly researched a number of products to line the hood and decided to stick with the big brand Dynamat. There are cheaper solutions from the hardware store if you just need a little foam padding, but if you want the best, buy this. Generally quality grades go (from best to worst): Aviation, marine, automotive, consumer/home. This stuff is made for cars and will outperform nearly any home-use product like foam for an attic etc. I contacted Dynamat and they officially do not sell on Amazon. They do officially sell with Summit Racing but the prices are much higher. I decided to order from Amazon directly and check the product. There's a lot of knock-off Dynamat online from less reputable vendors (Ebay etc). While the knock off stuff looks the same, it is not always closed-cell. You want closed cell foam for any exterior installation. Open cell foam will soak up water like a sponge and weigh a ton! Using the roll I got from Amazon and a 1ft by 1ft sample I got directly from Dynamat tech support, I confirmed the Amazon listed product I received was genuine. I even went so far as to weigh each square on a postage scale, soak them in water, and then weigh them again. Neither absorbed any water. The weight was the same after soaking. Installation was straight forward enough. Measure twice, or three times, cut once. I was able to cut the Dynaliner with a good pair of kitchen sheers and this seemed to work much better than box cutters. In order to ensure proper sizing, I cut out templates using construction paper, taped them in place on my hood using painters tape, and then traced them onto the Dynaliner. Be sure to get every nook and cranny filled. You want to ensure the liner is adhered to the entire surface with no air bubbles. To achieve this either start at one side and move to the other SLOWLY, or start in the middle and work out. I went side to side because I could trim off any excess when I hit the final edge. Peel the backing away as you go vs all at once (unless the size piece you are applying is small) because the adhesive is very sticky and it will be hard to keep it from sticking in the wrong places once you remove the backing. I did not use w DB meter to measure the sound drop in my interior but it is significant. I will report back in a year or 2 on durability but so far it looks great, and really cuts down the noise.

Damplifier (from Second Skin) + Dynaliner make for a great combination. Dynamat is far messier to install than Damplifier, but the Second Skin version of closed-cell foam liner is not self-adhesive. Thus the Damplifier/Dyanaliner combo, though not exactly cheap, makes for the best DIY install. For doors in particular, don't laze out and simply use big, single sheets to cover the "middle" of the door. (One often sees this in photos of 'professional' installs). Though it requires lots of small pieces because of limited access, take the time to put Damplifier on the outer door skin itself. 100% coverage with this is not necessary, but I do every surface that's reachable. Any material that's not securely stuck to a metal surface is wasted. IMO, it's also very important to treat the crash beams within the doors - they can act as tuning forks and contribute to noise and poor door speaker response. Doing this will take ~50% more material than one would guess by the expose door surface area, but it's worth it. The Dynaliner is stuck over the Damplifier and is much easier because it's far more flexible. By turning the doors into an almost-proper speaker box, stereo quality, especially in the bass, and especially at mid to high volumes is *greatly* improved. It's probably the cheapest sound system upgrade around. BTW, while the doors are opened, I also spray the corner where the outer door skin meets the door frame with waterproof synthetic grease. That corner is a great place for rust to start. Also, avoid covering that edge with soundproofing material - do not give water a place to be trapped and also make sure not to cover the drains at the bottom for the same reason. The 1/4" version of Dynaliner, when you have the clearance to use it, seems noticeably more effective than the 1/8" version. However, the 1/8" thick stuff is the best rattle reducer I've yet found for those annoying rattles coming from interfaces between plastic trim pieces and where the plastic trim is not tightly held in place against metal. Don't confuse this stuff with typical open-cell foam used for furniture cushions! It is useless as a sound deadening or blocking material. Get the real McCoy.

I first bought the dynamat original and installed that first months ago, and although it did kill some road noise and better the sound of the stereo, I was still not that happy as I thought it was going to be a major difference. However, as good as the difference was I knew I wanted more. My one annoyance was shaking coming for the front doors and second was one in the rear. So I decided to buy this and figured it wouldn't hurt to give it a try. As always, it's really not easy to remove the inner door and being the upmost careful is important because if something breaks it's costly to replace. My first time installing dynamat I accidentally broke the rear window switch which sadly is very very very fragile "shame on you BMW" and had to replace it. Now, the one thing I didn't dynamat was behind the airbag as that is something that you have to be very careful with, since my door handle broke and I had to remove the airbag, I noticed that not dynamating it was the one of the weaknesses for not getting great sound! "Do not unplug the airbag" keep it plugged at all times or you will get that airbag light. I used a bungee cord to hold it from the upper lock hook. It took me two and a half hours to install it and the sound improvement was amazing, bass was perfect and the treble was louder, and the car was silent as I needed it to be, the music now stays completely in the car. Now, two boxes is more than enough for the X5 and I have enough left over to use for something else. I used one box front driver and rear driver side and the other for the front and rear passenger as one box won't be enough for both front doors. Now I read a review where this same kind of product you can buy for much cheaper at at certain home shops depot, can you? Yes you can, but as they say, some times cheap will cost you more in the long run. The ones that they sell at these home stores will take you longer to install and once placed on you cannot remove unless ripping it to the point that you cannot use, an god forbid if the glue side touches the glue side, it will tear and will be useless. The dynamat will allow you to remove it without a tear, rip or break invade you make a mistake, and is reusable. I highly recommend using this and placing it over the dynamat for a major difference as it will not sound the way it should alone. It's like the perfect marriage. Pros: 1 Much less road noise compared to dynamat alone. 2 improved sound, deeper stronger bass, higher than high tones and the music is completly kept inside the car. 3. Relaxation when you really have time alone to enjoy it Cons: 1. Wish dynamat did custom cuts for cars, that would be amazing! 2. Nothing at all I also recommend buying the roller as it is very useful to the install. Buy the newer one which has the wood handle as it is more comfortable than the cheap one they had at first which would have given you blisters and break on you. Trust me, if you are like me and truly find peace within your car, then this is worth it!

I was refurbishing a removable hard top for a 1984 Mercedes SL and needed some foam for under the headliner. You can pickup cheap foam anywhere but it will absorb water, not as good as keeping heat/cold out and does not have the self adhesive. I had used Dynamat Extreme and Dynaliner on the floorboards and found a huge reduction in heat and noise reduction so I thought I would do the same on the roof. After stripping and repainting the hard top I cleaned the inside top cut and applied Dynamat Extreme with the Dynamat roller then cut and applied the Dynaliner. It really sticks! Then I put in a new headliner and installed all the trim. Now the car is so quiet with the hardtop, it is like a sedan. These older Mercedes are not as quiet as the post 1990 models and mine has an aftermarket Ansa exhaust system so it does have a bit of a purr when cruising. So I also added some of the remaining Dynaliner under the rear seat and over the wheel wells. Now the car sound like a.... Mercedes. Just after installing the new Dynaliner, I took a summer drive from SLC to LA - through the Mojave Desert. I kept putting my hand on the headliner and it was cool to the touch throughout a 110 degree day. WOW. Even if you don't think the foam you are planning to install will ever get wet, use this stuff. Condensation will find it's way into just about anything and normal porous foam hold that water and start to smell. This stuff is better at isolating sound, much better insulator and won't absorb water.

This product was just what I needed to better seal the doors of my car to improve bass response and reduce road noise. I installed this over a layer of Dynamat-type mass deadener and sealed the entire door cavity. The sealing from the Dynaliner had a significant impact on the sound quality and bass response of my door speakers. Installation was simple- just cut to size, peel-off the backing and press into place.

Works great easy to instal

I used the material to quiet down and isolate noises from motors and transformers in my stereo equipment. One example is I lined the top, bottom and sides of my CD player and it created a noticeably more quiet and substantial metal box which I hope will translate to higher quality sound. This type of improvement is subtle in many applications so if you are trying to tease the absolute best sound out of your equipment this is one way without having to spend a fortune. The material comes in a roll similar to aluminum foil. I rolled it out and cut pieces to the correct size that I needed to apply to the inside of the CD player housing. Once cut to shape all I did was pulled the backing paper off the sticky side and pushed it onto the surface I wanted the material to be applied to. Fast and easy, no mess. The product showed up quickly and was rather large at 54 inches long. This roll took care of my CD player, preamp and amplifier. I had it why not use on all the equipment. When you tap on the top of these units it is dead sounding which gives the piece of equipment a feeling of substantial quality. When my CD players draw goes in and out it is noticeably quieter. I am very satisfied.

This was installed in the roof of a 1969 Camaro we are restoring. The body man that replaced the roof said this was the best brand to use. Dynamat was installed first then the dynaliner. The size of the dynaliner sheet worked well so that seams are hidden by the roof struts. The dynaliner and dynamat are both between the inner supports and roof panel creating a solid roof damper.