The barrier materials covered by this specification are intended for use in specialized military methods of preservation. The combination of all performance characteristics of MIL-PRF-22019; vapor inhibitor ability; vapor inhibitor ability after exhaustion; transparency; storage stability; long term protection; contact corrosivity; seam and fabrication strength; compatibility with copper, blocking and puncture resistance; delamination; water resistance of markings, provides the necessary requirements for protection from exposure to the extremes of the navy/naval aviation environment. Navy/naval aviation items are exposed to high moisture, high salt concentration, transfer at sea, rough handling, and minimal storage conditions. There are no commercial equivalents that meet the physical, mechanical, and corrosion requirements necessary to protect materiel that is exposed to the operational naval aviation environment. Specifically, specialized Method of Preservation GS of MIL-STD-2073-1 uses MIL-PRF-22019 as the premier source of barrier materials that provides volatile corrosion inhibitor protection for applicable items encountering the above conditions.