A sealant and baffle component as set forth in claim 1, wherein said composition is a copolymer including ethylene and an ??,?? ethylenically unsaturated carboxylic acid partially neutralized with a metallic ion and is of the formulation E/X/Y, where E is ethylene, X is a carboxylic acid containing 3 to 8 carbon atoms, and Y may be alkyl acrylate, alkyl methacrylate, alkyl vinyl ether, carbon mono