Article having antifouling properties and intended to be employed in aquatic uses, in particular marine uses, which comprises: a) a support, b) optionally, at least one primer coat on said support comprising at least one anticorrosive product, c) at least one adhesion-promoting coat or tie coat, deposited on said primer coat or on said support when the primer coat is absent, and d) at least one antifouling coat or topcoat, deposited on said adhesion-promoting coat or tie coat, said article being characterized in that the antifouling coat and/or the tie coat is/are prepared from a curable polyorganosiloxane composition containing no tin, and characterized in that it comprises, firstly, a silicone base B capable of curing by means of a polycondensation reaction so as to give a silicone elastomer and, secondly, an amount of between 0.1% and 10% by weight of the total weight of a polycondensation catalyst which is a metal complex or salt A of formula: [Zn(L 1) r1 (L 2) r2];: with r1 ≥ 1 and r2 ≥ 0 and r1 + r2 = 2, in which: - the symbol L 1 represents a ligand which is a β-diketonato anion derived from a β-diketone or a β-ketoesterato anion derived from a β-keto ester having the following formula: R 1 COCHR 2 COR 3 in which: - R 1 represents a substituted or unsubstituted, linear or branched C 1 -C 30 hydrocarbon-based radical, - R 2 is a hydrogen or a hydrocarbon-based, in general alkyl, radical advantageously having at most 4 carbon atoms; - R 3 represents a substituted or unsubstituted, linear, cyclic or branched C 1 -C 30 hydrocarbon-based radical, or an -OR 4 radical where R 4 represents a substituted or unsubstituted, linear, cyclic or branched C 1 -C 30 hydrocarbon-based radical, where - R 1 and R 2 can be linked so as to form a ring, and - R 2 and R 4 can be linked so as to form a ring, and - the symbol L 2 represents an anionic ligand other than L 1, - with the additional proviso that the polycondensation catalyst A is not zinc diacetylacetonate. a) a support, b) optionally, at least one primer coat on said support comprising at least one anticorrosive product, c) at least one adhesion-promoting coat or tie coat, deposited on said primer coat or on said support when the primer coat is absent, and d) at least one antifouling coat or topcoat, deposited on said adhesion-promoting coat or tie coat, - the symbol L 1 represents a ligand which is a β-diketonato anion derived from a β-diketone or a β-ketoesterato anion derived from a β-keto ester having the following formula: R 1 COCHR 2 COR 3 - R 1 represents a substituted or unsubstituted, linear or branched C 1 -C 30 hydrocarbon-based radical, - R 2 is a hydrogen or a hydrocarbon-based, in general alkyl, radical advantageously having at most 4 carbon atoms; - R 3 represents a substituted or unsubstituted, linear, cyclic or branched C 1 -C 30 hydrocarbon-based radical, or an -OR 4 radical where R 4 represents a substituted or unsubstituted, linear, cyclic or branched C 1 -C 30 hydrocarbon-based radical, where - R 1 and R 2 can be linked so as to form a ring, and - R 2 and R 4 can be linked so as to form a ring, and - R 1 and R 2 can be linked so as to form a ring, and - R 2 and R 4 can be linked so as to form a ring, and - the symbol L 2 represents an anionic ligand other than L 1, - with the additional proviso that the polycondensation catalyst A is not zinc diacetylacetonate. - with the additional proviso that the polycondensation catalyst A is not zinc diacetylacetonate.