Siless Hybrid 3in1 200 mil 25 sqft Car Sound Deadening mat - Butyl Automotive Sound Deadener - Noise Insulation and Vibration Dampening Material

I was sound and heat insulating a generator bay in my class A RV so I did three tests before and during material application: I did a sound level test to see how effective the material was for my application, a "stickiness" test, and a flammability test. This was indoors on a dry 78°F day. From beginning to end, the entire process, including testing, took 5 hours to install 25 sqft or material in a very complex area. One hour for cleaning, 3 hours for installation, and 1 hour for test setup and testing.Using a sound meter, I took before and after readings and determined that I reduced the sound level by 2.2 db (40% energy decrease) with a noticeable decrease in sound and frequency. The generator bay is located under the master bedroom in the aft portion of the coach. The sound went from a rattling, vibrating generator noise to a more tolerable low level rumble.The material was easy to apply. I did some testing prior to application and determined that surface preparation is key. I cleaned my painted metal surface and then degreased with acetone and the material stuck well. Be careful and purposeful when you apply the material because once it was stuck to the metal, it was quite difficult to remove or reposition.Since it was going to be installed into a gasoline powered generator bay located under our sleeping quarters, I did some flame testing to determine the level of risk. Although not highly flammable after installation, my testing revealed that the PE used will catch on fire under certain circumstances. In order to reduce the risk, I used aluminized duct tape to ensure that all the edges were sealed and the PE was not exposed to direct flame in the event of a fire. I also decided to install an automatic fire extinguisher as an added precaution. In all fairness there should be one installed in the generator bay anyway.All in all, I am very satisfied with the product and the results. I have recommended this product to my other RV owner friends.

Bought 2 cases of this to do the side walls and roof of the interior of my chevy express. Its really good stuff.. goes on easy. I like the size of the tiles.Huge bit of advice is keep them out of direct sunlight when installing and try to do it below 65 degrees I would say. It got up to about 70F and the adhesive got pretty tackie and hard to peel from the backing.Sound and insulation wise.. it does make a difference with sound. Going down the road it really makes my van smooth. Insulation from temp though we’ll have to wait until the summer to see

The mat seems to be well made, its two layers of butyl with a foam core sandwiched between them. Then the outside has a really nice vinyl surface. I had concerns about it sticking to the prepped surfaces but it surprised me how well it held. Seems to do a good job at reducing the sound and made my truck sound like less of a tin can on the inside if that makes sense. On the downsides I would say it doesn't do much to keep the heat out but it certainly helps. Overall still 5 stars in my book. It was surprisingly easy to cut to size and apply. I would recommend anyone looking at the SILESS line of products to go ahead and splurge for the Hybrid mat.

I really like this stuff for the added sound insulation. MLV is great for reducing resonance, but it really doesn't add any insulation from road noise etc. I installed three boxes of this in my Tacoma. Floor, doors, rear cab panel, roof. It is amazing how much quieter it is in the hwy. Road noise is pretty much non-existent . It also did a great job on the doors for my sound system to reduce resonance and buzzes. It is not quiet as good as the Siles butyl deadner for isolating and removing panel resonance, but I think the reduction of road and tire noise is well worth the trade off. There are many people who use this over the butyl, which I'm sure is just amazing!

I recently installed the Siless Hybrid 3in1 200 mil sound deadening mat in my car, and I’m genuinely impressed with the quality and performance. The unique layering design, especially the second layer, provides superior sound insulation and vibration dampening. The butyl rubber layer is thick and adheres well to surfaces, creating an effective barrier against road noise and vibrations.Applying this mat was straightforward, and the flexibility of the material made it easy to install, even in tight spaces. After installation, I immediately noticed a reduction in noise, making my car much quieter and more comfortable. This product is perfect for anyone looking to upgrade their vehicle’s soundproofing. Highly recommended!

Great product. EXTREMELY sticky. Don't leave in sun or it's difficult to peel from paper. I used it on inside of my doors and it made a day and night difference in my truck to silence the road noise and bass from my subwoofer wall I have.

Put on top of the sound deadener in my 66 F100. HUGE improvement in sound level and heat transfer. It got rid of the oil drum effect that the big panels on these old cars tend to have. Will definitely be using again in the future.

This stuff is pretty easy to work with , make sure the surfaces are clear of dirt and grease, use a piece of cardboard to make out a rough template then cut the film to size, you need sharp scissors.Work when its about 70 F the hotter the temps the stickier the adhesive is.Preplan your layout so the letters all match in direction.I used the roller tool to set the material in place this makes it easy getting the air pockets out.I am amazed at how much quieter my car is, I used this on a Porsche 928, in the hatch area and the front floors and on the back sides of the fender block off plates. I will add it to the doors at a later date.I recommend this material its works great.