Abstract: The invention provides a transparent gas barrier polymer-glass-polymer laminated film comprising a first polymeric film substrate; a silicate glass layer, comprising silica and a salt of a monovalent cation other than Lithium, in combination with at least one additive selected from organo-silanes or an epoxy silane precursor, laminated onto said first polymeric film substrate; and a second polymeric film laminated on said glass layer; wherein the oxygen transmission rate through the laminated polymer-glass-polymer film is lower than 0.2 cc/m2/day and methods for the production thereof.