NOVELTY - Flexible barrier film (10) having a thickness of greater than zero to less than 5000 nm and a water vapor transmission rate of no more than 1x 10-2 g/m2/day at 22 degrees C and 47% relative humidity, is claimed, where the flexible barrier film is formed from a composition, which comprises a multi-functional acrylate, and reaction product of an alkoxy-functional organometallic compound (b1) and an alkoxy-functional organosilicon compound (b2), and water in an amount sufficient to ensure the reaction product does not gel and a precipitate does not form from it.    USE - The flexible barrier film is useful in organic electronic devices, which comprise an organic light emitting diode device, an organic photovoltaic device or an organic electrochromic device (all claimed). The flexible barrier film is useful in food preservation applications.    ADVANTAGE - The flexible barrier film has excellent water vapor transmission, planarizing properties, adhesion, and flexibility. The organic electronic device, which includes the flexible barrier film, has excellent longevity and resistance to degradation due to the excellent water vapor transmission rates of the flexible barrier film.    DETAILED DESCRIPTION - Flexible barrier film (10) having a thickness of greater than zero to less than 5000 nm and a water vapor transmission rate of no more than 1x 10-2 g/m2/day at 22 degrees C and 47% relative humidity, is claimed, where the flexible barrier film is formed from a composition, which comprises a multi-functional acrylate, and reaction product of an alkoxy-functional organometallic compound of formula (M(OR)4) (b1) and an alkoxy-functional organosilicon compound of formula (XaSi(OR1)b) (b2), and water in an amount sufficient to ensure the reaction product does not gel and a precipitate does not form from it.    M = silicon, zirconium or titanium;    X = monovalent organic radical, which comprises at least one ethylenically unsaturated group and is vinyl-, hexenyl-, methacryloxy, acryloxy-, styryl- and/or vinyl ether-radicals;    OR, OR1 = alkoxy group; and    a, b = 1-3, where the sum of a and b is 4.    INDEPENDENT CLAIMS are included for:    (1) forming the flexible barrier film on a substrate (12), comprising disposing the composition on the substrate, and curing the composition to form the flexible barrier film on the substrate;    (2) an organic electronic device, comprising a support layer, an organic electronic material disposed on the support layer, an adhesive layer disposed on the organic electronic material, and the flexible barrier film disposed on the adhesive layer such that the organic electronic material is encapsulated by the support layer, the adhesive layer, and the flexible barrier film; and    (3) the composition for forming the flexible barrier film.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of a flexible barrier film disposed on a substrate.    Flexible barrier film (10)    Substrate. (12)