B-Quiet Sound Deadening Composites are designed to reduce airborne sound waves and absorb vibration. A combination of thick mass-loaded vinyl decoupled by a closed-cell foam makes it very effective at eliminating gear, exhaust, and road noise. Installed with the foam towards the engine or gear noise, It is attached with a spray adhesive.  Able to reduce in-cabin sound by over 14db in lab tests, This mass-loaded vinyl can be used on its own, or on top of our B-Quiet sound deadeners.