Cavity sealing article

摘要

A cavity sealing article comprises (a) a planar support member; and (b) a sealing member comprising a foamable polymer surrounding and in intimate contact with the support member in the plane of the support member, the sealing member comprising at least two layers in intimate contact in the plane of the support member, the outermost of the layers comprising an uncrosslinked foamable polymer, and an inner layer comprising a crosslinked foamable polymer.