Curable composition comprising a) at least one polymer having at least one silicon-containing group of Formula -Si(R 1) k 3-k, wherein each R 1 is independently selected from a hydrocarbon radical containing 1 to 20 C atoms or a triorganosiloxane group of formula -O-Si(R 2) 3, wherein each R 2 is independently selected from a hydrocarbon radical containing 1 to 20 C atoms; each Y is independently selected from a hydroxy group or a hydrolysable group; and k is 0, 1 or 2; b) at least one hydroxyl-functionalized polysiloxane polyalkyleneglycol brush copolymer represented by Formula wherein: Z is a C 1 -C 8 alkylene group which contains O; R 1, R 2, R 3, R 4 and R 5 may be the same or different and are independently selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom, wherein R 3, R 4 and R 5 may be independently selected in each unit n1, n2, n3, and p; R 12 is selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; R 7 is selected from hydrogen or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; R 8, R 9, R 10 and R 11 may be the same or different and in each unit m they are independently selected from hydrogen or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; n1 and n2 is an integer independently selected from 0 to 1000, preferably from 2 to 500, more preferably from 5 to100, with the proviso that not both of n1 and n2 are 0; n3 is an integer from 0 to 1000; p is an integer from 0 to 1000, preferably from 1 to 500, more preferably from 5 to100; and m is an integer from 1 to 1500, preferably from 1 to 1000. a) at least one polymer having at least one silicon-containing group of Formula -Si(R 1) k 3-k, wherein each R 1 is independently selected from a hydrocarbon radical containing 1 to 20 C atoms or a triorganosiloxane group of formula -O-Si(R 2) 3, wherein each R 2 is independently selected from a hydrocarbon radical containing 1 to 20 C atoms; each Y is independently selected from a hydroxy group or a hydrolysable group; and k is 0, 1 or 2; each R 1 is independently selected from a hydrocarbon radical containing 1 to 20 C atoms or a triorganosiloxane group of formula -O-Si(R 2) 3, wherein each R 2 is independently selected from a hydrocarbon radical containing 1 to 20 C atoms; each Y is independently selected from a hydroxy group or a hydrolysable group; and k is 0, 1 or 2; b) at least one hydroxyl-functionalized polysiloxane polyalkyleneglycol brush copolymer represented by Formula wherein: Z is a C 1 -C 8 alkylene group which contains O; R 1, R 2, R 3, R 4 and R 5 may be the same or different and are independently selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom, wherein R 3, R 4 and R 5 may be independently selected in each unit n1, n2, n3, and p; R 12 is selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; R 7 is selected from hydrogen or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; R 8, R 9, R 10 and R 11 may be the same or different and in each unit m they are independently selected from hydrogen or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; n1 and n2 is an integer independently selected from 0 to 1000, preferably from 2 to 500, more preferably from 5 to100, with the proviso that not both of n1 and n2 are 0; n3 is an integer from 0 to 1000; p is an integer from 0 to 1000, preferably from 1 to 500, more preferably from 5 to100; and m is an integer from 1 to 1500, preferably from 1 to 1000. Z is a C 1 -C 8 alkylene group which contains O; R 1, R 2, R 3, R 4 and R 5 may be the same or different and are independently selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom, wherein R 3, R 4 and R 5 may be independently selected in each unit n1, n2, n3, and p; R 12 is selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; R 7 is selected from hydrogen or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; R 8, R 9, R 10 and R 11 may be the same or different and in each unit m they are independently selected from hydrogen or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; n1 and n2 is an integer independently selected from 0 to 1000, preferably from 2 to 500, more preferably from 5 to100, with the proviso that not both of n1 and n2 are 0; n3 is an integer from 0 to 1000; p is an integer from 0 to 1000, preferably from 1 to 500, more preferably from 5 to100; and m is an integer from 1 to 1500, preferably from 1 to 1000.