Abstract: A sheeting of multilayer antidrumming lining material, viz. a film containing bitumen or plastic, or a combination film containing bitumen and plastic, which is backed with a wide-meshed fabric having a high tensile strength. This high-tensile fabric backing prevents the antidrumming film, on the one hand, from cracking and, on the other, it holds it even when in a plasticized condition on the upper edge of a steeply inclined or vertical sheet metal component, so that the piece of antidrumming film hanging thereon cannot slide off. Also, due to the backing fabric, the film does not flap away outwardly and upwardly in the area where a steep descent starts. Finally, the tensile strength of the plasticized film is increased such that it cannot crack under the influence of gravity in the area of vertical sides.

Abstract: A multilayer sheeting for attachment to sheet metal to stiffen the sheet metal and diminish noise. An anti-drumming sheeting consisting of a filler embedded in a mass such as a bituminous material may be bonded to sheet metal, such as the sheet metal employed in manufacture of an automobile door, and a stiffening sheeting which may consist of a matrix such as a fiberglass mat drenched in a thermosetting resin is bonded to the anti-drumming sheeting. Such a multilayer anti-drumming and stiffening sheeting is flexible enough during application to conform to the configuration of the sheet metal, but hardens into a rigid lining component when the sheet metal is heat treated during the normal course of fabrication.