A curable composition comprising: a functionalized fluoropolyether comprising: a random copolymer represented by the general formula XCF 2 O(CF 2 O) w (C 2 F 4 O) x (C 3 F 6 O) y (C 4 F 8 O) z CF 2 Y wherein w, x, y and z independently represent integers ranging from 0 to 30, with the proviso that w + x + y + z ≥ 6; and X and Y independently represent: a free-radically polymerizable ethylenically-unsaturated group -Z-CW=CW 2, wherein each W independently represents H, Cl, F or CF 3, and Z represents a covalent bond or an alkylene group having from of 1 to 10 carbon atoms and optionally substituted by at least one fluorine, chlorine, oxygen, nitrogen, sulfur, or a combination thereof, and with the proviso that at least one W is H; a halogenated alkyl group having from 1 to 10 carbon atoms and optionally substituted by at least one oxygen, nitrogen, or a combination thereof; -I; -Br; -Cl; -CN; or a cyanoalkyl group having from 2 to 11 carbon atoms and optionally substituted by at least one fluorine, oxygen, nitrogen, or a combination thereof; and a functionalized polysiloxane comprising at least one second free-radically reactive functional group selected from the group consisting of: -I; -Br; -Cl; -CN; monovalent organic groups containing at least one -I, -Br, -Cl, -CN; and monovalent free-radically polymerizable ethylenically-unsaturated organic groups; and an effective amount of a free-radical curing system. a functionalized fluoropolyether comprising: a random copolymer represented by the general formula XCF 2 O(CF 2 O) w (C 2 F 4 O) x (C 3 F 6 O) y (C 4 F 8 O) z CF 2 Y wherein w, x, y and z independently represent integers ranging from 0 to 30, with the proviso that w + x + y + z ≥ 6; and X and Y independently represent: a free-radically polymerizable ethylenically-unsaturated group -Z-CW=CW 2, wherein each W independently represents H, Cl, F or CF 3, and Z represents a covalent bond or an alkylene group having from of 1 to 10 carbon atoms and optionally substituted by at least one fluorine, chlorine, oxygen, nitrogen, sulfur, or a combination thereof, and with the proviso that at least one W is H; a halogenated alkyl group having from 1 to 10 carbon atoms and optionally substituted by at least one oxygen, nitrogen, or a combination thereof; -I; -Br; -Cl; -CN; or a cyanoalkyl group having from 2 to 11 carbon atoms and optionally substituted by at least one fluorine, oxygen, nitrogen, or a combination thereof; and a random copolymer represented by the general formula XCF 2 O(CF 2 O) w (C 2 F 4 O) x (C 3 F 6 O) y (C 4 F 8 O) z CF 2 Y wherein w, x, y and z independently represent integers ranging from 0 to 30, with the proviso that w + x + y + z ≥ 6; and X and Y independently represent: a free-radically polymerizable ethylenically-unsaturated group -Z-CW=CW 2, wherein each W independently represents H, Cl, F or CF 3, and Z represents a covalent bond or an alkylene group having from of 1 to 10 carbon atoms and optionally substituted by at least one fluorine, chlorine, oxygen, nitrogen, sulfur, or a combination thereof, and with the proviso that at least one W is H; a halogenated alkyl group having from 1 to 10 carbon atoms and optionally substituted by at least one oxygen, nitrogen, or a combination thereof; -I; -Br; -Cl; -CN; or a cyanoalkyl group having from 2 to 11 carbon atoms and optionally substituted by at least one fluorine, oxygen, nitrogen, or a combination thereof; and a functionalized polysiloxane comprising at least one second free-radically reactive functional group selected from the group consisting of: -I; -Br; -Cl; -CN; monovalent organic groups containing at least one -I, -Br, -Cl, -CN; and monovalent free-radically polymerizable ethylenically-unsaturated organic groups; and an effective amount of a free-radical curing system.