The following materials are installed into rear door panels (rear door cards).
REAL SCHILD ( Reduce the vibration )
EPT SEALER ( Soundproofing / Sound insulation )
REAL SCHILD "Absorb" ( Vibration damper and Noise barrier - 80 degrees C heat resistance)
THINSULATE ( Sound insulation - Light weight )
Unfortunately, I lost the pics of installation.....
REAL SCHILD "Absorb" is put on the outer panel
REAL SCHILD ( Reduce the vibration ) is put on the inner panel.
Regarding the back of door cards, REAL SCHILD "Absorb", EPT SEALER and THINSULATE are installed.