Effective Sound insulation Application: roof,door,floor,rear deck.Contents: 500mm*1000mm*6mm or 10mm,30pcs/box.Boyin insulation mat is self adhesive mats of highly effective acouatical grade close cell foam as thermal-acoustic barrier. it is light weight & flexible, perfect for reducong heat and noise generated from engines,exhausts or the summers sun. Boyin recommend that apply it on the damping material-Boyin Super Shield. when applied on Boyin Super Shield, these products will insulate the noise and heat that penetrate the Super Shield below and make your car cool and quiet Apply the Boyin Super Shield insulation mat the panel first, and cut the Boyin Insulation mat according to the contours of the panel with razor knife or scissors. Apply the Insulation mat on the Boyin Super Shield.