Review on 🚗 Ninety-Mil Thick NVX SDBP40 Car Sound Damping Mat - 40 sqft. Butyl Automotive Sound Deadener for Audio Noise Vibration Insulation and Dampening (Ten 18” x 32” Sheets) by Joe Kokenge

Very happy with this material. I've only used it on my two front doors so far but the results are excellent. Cuts very easily with a utility knife, adheres very well and bends around the bends and corners of the sheet metal much easier than I expected. I used 2 layers on the outer door and 3 layers behind the speakers with foam padding on top to absorb the incoming waves. Then I placed it on the inner door and sealed all the holes including the huge hole left by the manufacturer for servicing the window mechanism. I hope I never have to go back there lol. I tapped on the outside of the door and then the other side that hadn't been worked on and the difference in resonance and vibration was significant. I also got a SIGNIFICANT amount of mid-bass from my Focal 165 k2 speakers. There are also big differences in road noise. When I have more time, there is still a lot left to do the trunk. From now on I will be using the NVX soundproofing in every setup I ever do. Don't spend thousands on great speakers, amps, processors, etc. without proper noise isolation and installation. Great quality at a great price