Elastomeric butyl compound with no cheap fillers or asphalt Annealed, black matte foil with ghosted Second Skin logos 2mm sound deadening material: total thickness (2mm) Each sheet is 12” x 20” (1.67 sq ft) and weighs about 0.70 lbs/sq ft Temperature rated from -75°F to 450°F Guaranteed adhesion for the life of your vehicle Proudly made in the USA