A peelable and sealable lidstock constructed from a metal substrate and a sealing layer, the sealing layer containing (A) from 70-89% by weight of a copolymer having one or more polymerized olefin monomers and one or more polymerized ethylenically unsaturated (poly)carboxylic acid monomers, (B) from 10-29% by weight of a copolymer comprising one or more polymerized (meth)acrylate ester monomers, and (C) from 1-10% by weight of one or more inorganic particles characterized by a mass median diameter (D50) comprised between 1 and 5 micron.