Heat and Sound Insulation from DEI - This revolutionary material adds a new dimension to control heat with minimal clearance needed, only 3/16in.. The Floor and Tunnel Shield is constructed using an embossed 10 mil aluminum face bonded to a 1/8in. composite fiberglass insulation and is backed with an aggressive adhesive that holds past 450 degrees F. Capable of handling direct temperatures up to 1750 degrees F. Tough enough for under vehicle applications. Also blocks up to 50% of unwanted road noise. Sheet measure 4' x 42in.. Made in the USA.