Abstract: A barrier liner for sealing reinforced composite vessels at cryogenic temperatures is provided wherein the barrier liner is composed of a polymeric composition containing a curing agent, such as a methyl bis-methyl anthranilate, and an elastomer adhesive, such as a two-part polyether based urethane adhesive. A method of manufacturing and applying the barrier liner is also provided, including the steps of mixing and degassing the polymeric composition and introducing the polymeric composition between two polyethylene carrier sheets. The two carrier sheets and the intermediate polymeric composition layer are then passed between two sizing rollers set apart at a predetermined distance. The encapsulated polymeric composition is then partially cured to a tacky gel state and cooled to arrest polymerization until application of the gel layer. The gel layer and the two carrier sheets can then be cut into any desired shape such as strips, and applied to the inner surface of a vessel.

Abstract: A flexible, e.g. polyurethane, open cell foam sheet is impregnated with a controlled amount of a liquid polymerizable resin system which cures at ambient temperature, and the resin impregnated sheet is immediately chilled at a suitably reduced temperature, e.g. 40.degree. F. or below, to arrest polymerization or hardening. The resulting resin impregnated sheet is stored at such reduced temperature. When needed for adhesive bonding the chilled resin impregnated sheet, cut to the desired pattern or size, is applied between the surfaces of objects to be bonded, e.g. fiber reinforced polyurethane insulation blocks and plywood strips, or such insulation blocks and the steel hull of a liquid natural gas (LNG) container or marine tanker.