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

I recently installed the Siless Hybrid 3-in-1 sound deadening mat in my vehicle, and I’m genuinely impressed. For just $80 for 25 square feet, this product delivers performance that rivals materials costing twice as much — and with far less hassle. If you're on the fence......Just buy it! You will not be disappointed.Easy to Install: Unlike traditional sound deadening products that are stiff, sharp, and temperature-sensitive, this mat is soft, flexible, and easy to work with. I cut it cleanly with regular scissors and pressed it into tight spaces using just my fingers, so if in you don't have a roller or install tool, a good pair of scissors and your hands can get the job done. With other brands like Dynamat, the aluminum layer often leaves micro cuts on your hands and tears up your fingertips, but Siless does not due the acoustic layer being on top and above the aluminum layer that holds the butyl layer. So, it's very easy on your hands.Even in cooler temperatures (around 50°F), I had no trouble applying it but it goes on better heated. If warm outside, I would leave the entire box out in the sun for at least 30 minutes when it's warm or heats it's very pliable and easy to mold. Make sure its where you want it because once applied it's not ever falling off. and it became even more pliable and easy to mold. No heat gun, no mess — just straightforward application.I installed 40–50 square feet throughout the interior, covering everything except the headliner and the flooring forward of the rear seat. The difference in cabin noise is astonishing. I can turn my radio up concert loud with gut-punching bass, and from outside the car, it sounds like a factory sound system at mid volume. I was blown away by how well it contains sound — both inside out and outside in.My exhaust is pretty aggressive and now is barely audible from inside the cabin. While driving, it almost sounds like a stock factory setup. The Siless matting actually changed the driving experience and feels refined.If you're skeptical about sound deadening gimmicks, I get it, but this is the first product I've used and when I needed more, I went Stright to the 3 in 1 Hybrid matting and purchased it again. I love researching before buying and that's very uncommon for me to do.Note: Proper installation is key, and it does take time and patience. But if installed correctly and in the right places, it works better previously used from paint-on sound deadening to Dynamat.Update Nov, 2025After using it this in 4 separate vehicles now. I feel the Siless’s 3 in 1 Hybrid has nailed it for best budget deadener that is better than dynamat extreme in performance and installationProtip: buy a roll of 2-3” aluminum tape and tape the seams. After trimming the edges tend to very sticky between the panels. I ran a strip of aluminum tape over the seems to create a better seal and true moistureI used it on four vehicles now and have I have not been paid to review and purchased every order myself.3 in 1 Hybrid deadener by Siless is the best all around easy to apply sound deadner period!

As the owner of a custom automotive shop, I've installed several different sound deadening products over the years. We recently used this hybrid mat on a full early Bronco build, covering the floor, doors, quarter panels, and wheel wells. It took three 25 sq. ft. boxes to complete the job.Installation was straightforward. The material was easy to cut, conformed well to the panels, and rolled down nicely. Even before the vehicle is back on the road, you can tell it reduced panel resonance and made the body feel much more solid when tapping on the panels.We haven't driven the Bronco yet, so I can't comment on road noise or heat transfer, but the initial results are very promising.The only issue we ran into was during installation in hot weather. The adhesive became so tacky that it wanted to stay attached to the release paper, making the backing difficult to remove. We brought the boxes into the A/C for a couple of hours, and once they cooled down, the backing peeled off much easier. If you're installing in the summer, I'd recommend keeping the material cool before use.Overall, this seems like a quality product that's easy to install, and based on the installation experience, I'd use it again on future builds.

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.

Did the floor and firewall, doors hood and roof of my 97 F250Hd, the last great OBS Ford F250.I dont even recognize it any more, quiet and more solid sounding (If that's possible) . Get the rollers to help install it and really press it in. AMAZING difference. I can hear in the cab now so much better.

Really good for the price. Easy to apply and sticks very solidly once in place. Noticeable difference in road noise after doing the floor and no rattles or vibrations from the doors. You can always go crazy and spend a fortune on sound deadening products and there’s always something “better” out there, but this product is a great option if you’re looking for good results at a reasonable price.

I have installed all kinds of insulation in vehicles over many years. I only needed to purchase 2 boxes to complete the entire interior siding of my 2025 chevy express, what a great value! I wanted to insulate my locksmith van for sound and heat. The sound reduction virtually eliminated the road noise. These panels also look amazing. It got up to 110F in the sun with the doors closed. After adding Siless insulation the temperature maxed out at 97F. That is a massive difference. Plus, I didn't even finish with the roof before testing. Siless Hybrid 3in1 was extremely easy to cut and adhere onto metal panels. I'm impressed with the quality of the individual panels and the adhesive is not toxic smelling compared to some others. My favorite thing about these panels is you can actually take them off and readjust them before they finally stick and they do not leave any black residue behind when you pull them up to adjust them. All I needed was a heat gun, knife and a roller to complete this job. The size of each panel is perfect, you can handle them with ease. I probably won't need your product again for a while, but when I do I will definitely be back.

Very good sound proofing and insulation for a great price.

I have used several different types of sound deadener over the years, and on multiple vehicles. I did all 4 doors and the back wall and floor of my F150 when I got it a few years ago and upgraded the stereo. The roof had left me wondering if it needed to be done or not.I decided on this product and went to town. It sticks well and cut fairly easily. I was able to cover the whole roof of my truck with about 20 sq ft. It got rid of almost all rain noise, which was one thing I was looking for. It did not cut down on wind noise as much as I had hoped. I believe this to be due to the fact that more noise was coming from the windshield itself rather than the roof. Sound quality is slightly better in the cabin but it's not a tremendous difference.Where it does seem to have made a considerable difference is with heat/cold. The truck stays at a much more consistent temp, even in the sun, and I don't need to run the heater or AC as hard anymore. Overall, I'm glad I did it for a weekend project, just don't expect it to eliminate all road or wind noise.

Installed everywhere under the dog house and wheel wells in our 2014 Fleetwood class A Rv, gas engine what a difference in sound. I can now talk normally to my wife in the passenger seat or when she is sitting in the back in the couch. Easy installation, I used a rubber mallet to slightly tap them in place. 1000 KM in and nothing melted or moved. Very happy with this product.

الي ازعجني إني كنت متوقع أنها أمريكية طلعت صنع في كازاخستان شي مخزي

Proper soundproofing for a great price. Not that butyl useless sound proofing sold everywhere

Product exceeded my expectations. I was replacing the carpet in the cargo area of a 2003 4runner, and thought I'd apply some soundproofing in the process as my rig (V8, headers, exhaust, AT tires) is a very noisy ride. I applied the mat to the entire cargo floor and wheel wells (interior, approx 20 sq'). I found the Siless product significantly reduced the road and muffler noise, even prior to applying closed foam and carpet over the area. I was expecting a modest improvement based on online research, but wow, way better than I was expecting. Quality product, fair price.

Exactly what I was looking for f perfect.