A moisture-curable silylated resin-containing composition comprising: a) moisture-curable silylated resin, prepared by reacting a hydroxyl-terminated polyurethane prepolymer with an isocyanatosilane, wherein the hydroxyl-terminated prepolymer is prepared by reacting a molar excess of a polyol selected from the group consisting of poly(oxyethylene) diols, poly(oxypropylene) diols, poly(oxyethylene-oxypropylene) diols, polyoxyalkylene triols and polytetramethylene glycols having a number average molecular weight of from 4,000 to 18,000 grams/mole and an end group unsaturation level no greater than 0.04 milliequivalent per gram of polyol with a diisocyanate and wherein the isocyanatosilane is of the formula: OCN-R 5 -Si(R 5) y (OR 7) 3-y where R 5 is an alkylene group of up to 12 carbon atoms; R 6 is an alkyl or aryl group of up to 8 carbon atoms; R 7 is the same or different alkyl group of up to 6 carbon atoms; and y is 0, 1 or 2, which upon curing, provides a cured resin exhibiting permeability to gas; b) at least one other polymer selected from the group consisting of low density polyethylene, very low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, polyisobutylene, polyvinyl acetate, polyvinyl alcohol, polystyrene, polycarbonate, polyester, such as, polyethylene terephthalate, polybutylene terephthalate, polyethylene napthalate, glycol- modified polyethylene terephthalate, polyvinylchloride, polyvinylidene chloride, polyvinylidene fluoride, thermoplastic polyurethane, acrylonitrile butadiene. styrene, polymethylmethacrylate, polyvinyl fluoride, polyamides, polymethylpentene, polyimide, polyetherimide, polyether ether ketone, polysulfone, polyether sulfone, ethylene chlorotrifluoroethylene, polytetrafluoroethylene, cellulose acetate, cellulose acetate butyrate, plasticized polyvinyl chloride, ionomers, polyphenylene sulfide, styrene-maleic anhydride, modified polyphenylene oxide, ethylene-propylene rubber, polybutadiene, polychloroprene, polyisoprene, polyurethane, styrene-butadiene-styrene, styrene-ethylene-butadiene-styrene, polymethylphenyl siloxane and mixtures thereof; and c) at least one nanoclay modified with a cationic surfactant-exfoliating agent, wherein the nanoclay particles have a lateral dimension of between 0.01 μm and 5 μm and a vertical dimension of between 0.5 nm to 10 nm. a) moisture-curable silylated resin, prepared by reacting a hydroxyl-terminated polyurethane prepolymer with an isocyanatosilane, wherein the hydroxyl-terminated prepolymer is prepared by reacting a molar excess of a polyol selected from the group consisting of poly(oxyethylene) diols, poly(oxypropylene) diols, poly(oxyethylene-oxypropylene) diols, polyoxyalkylene triols and polytetramethylene glycols having a number average molecular weight of from 4,000 to 18,000 grams/mole and an end group unsaturation level no greater than 0.04 milliequivalent per gram of polyol with a diisocyanate and wherein the isocyanatosilane is of the formula: OCN-R 5 -Si(R 5) y (OR 7) 3-y where R 5 is an alkylene group of up to 12 carbon atoms; R 6 is an alkyl or aryl group of up to 8 carbon atoms; R 7 is the same or different alkyl group of up to 6 carbon atoms; and y is 0, 1 or 2, which upon curing, provides a cured resin exhibiting permeability to gas; b) at least one other polymer selected from the group consisting of low density polyethylene, very low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, polyisobutylene, polyvinyl acetate, polyvinyl alcohol, polystyrene, polycarbonate, polyester, such as, polyethylene terephthalate, polybutylene terephthalate, polyethylene napthalate, glycol- modified polyethylene terephthalate, polyvinylchloride, polyvinylidene chloride, polyvinylidene fluoride, thermoplastic polyurethane, acrylonitrile butadiene. styrene, polymethylmethacrylate, polyvinyl fluoride, polyamides, polymethylpentene, polyimide, polyetherimide, polyether ether ketone, polysulfone, polyether sulfone, ethylene chlorotrifluoroethylene, polytetrafluoroethylene, cellulose acetate, cellulose acetate butyrate, plasticized polyvinyl chloride, ionomers, polyphenylene sulfide, styrene-maleic anhydride, modified polyphenylene oxide, ethylene-propylene rubber, polybutadiene, polychloroprene, polyisoprene, polyurethane, styrene-butadiene-styrene, styrene-ethylene-butadiene-styrene, polymethylphenyl siloxane and mixtures thereof; and c) at least one nanoclay modified with a cationic surfactant-exfoliating agent, wherein the nanoclay particles have a lateral dimension of between 0.01 μm and 5 μm and a vertical dimension of between 0.5 nm to 10 nm.