SilessHybrid 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.

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.

This stuff works equally as well as the more expensive stuff. I did the entire cabin of my new ranger raptor with this when I upgraded my audio system.The doors no longer sound like tin, and it's luxury quiet inside when on the highway.Very impressed and highly recommended.

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.

I wanted to add sound proof material to the bare metal areas on the floor of my Toyota Tundra. The area behind the front seats had a haphazard application of sound deadening material. There were several complications to the project which may come up in other vehicles.First is the floor covering which had plastic pillars underneath to support any weight on the cover. The sound deadening material had to be cut out so these pillars would rest on the bare metal of the floor. This required a lot of cutting with a utility knife and at times heavy scissors. The instructions say to make a template before cutting the material and I did this for the driver's side. This doubled the amount of time needed to install it. On the passenger's side I laid the rectangles of material with the backing on and pressed the floor covering onto the material. This showed where the support pillars were, which I then cut out.Second is peeling the backing off the material. This can be very difficult as the adhesive sticks to it. The backing came off in multiple pieces and sometimes took 5 minutes for one piece. They say to wear gloves when handling the material but this is impossible when trying to get the backing off.Third is pressing the material onto the metal. The instructions say to use a roller, but this was impossible for the irregular surface I was working on. The hand is the best tool to press the material on.The material seems to be of high quality and I expect it will reduce the road noise in the cab.

Super impressed with the quality for the price. Works perfectly for its intended function. Also used it in some areas with compressors that were extra loud to cover the inside of their casings and it silenced them significantly.

Siless products are a great value for the price. I have used several different kinds over the years but am munch happier with the quality of their products and so many different options. They had great quick responding customer service too.

Easy to install! Ease of use and good quality!