Composition comprising (a) at least one N-methyl-N-acylglucamine of Formula wherein R1 is selected from an - unbranched or branched, and - saturated or mono-unsaturated or poly-unsaturated C1-C21 alkyl residue; and (b) at least one copolymer comprising at least two structural units selected from: 0 to 99 mole-% structural units of Formula, 0 to 99 mole-% structural units of Formula, 0 to 99 mole-% structural units of Formula and 0 to 99 mole-% structural units of Formula, wherein R2 is hydrogen or C1-C6 alkyl, A is C2-C4 alkylene groups, and B is C2-C4 alkylene groups with the proviso that A is different from B, and x, y are independently from one another an integer from 1 to 100, R3, R4 are independently from one another hydrogen or C1-C6-alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R5 is hydrogen or C1-C6 alkyl, D is C2-C4 alkylene groups, and Z is an integer from 1 to 50, R6, R7 are independently from one another hydrogen or C1-C6 alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R8 is hydrogen or C1-C6 aklyl, and wherein the structural units,,, and add up to 100 mole-%. (a) at least one N-methyl-N-acylglucamine of Formula wherein R1 is selected from an - unbranched or branched, and - saturated or mono-unsaturated or poly-unsaturated C1-C21 alkyl residue; and - unbranched or branched, and - saturated or mono-unsaturated or poly-unsaturated C1-C21 alkyl residue; (b) at least one copolymer comprising at least two structural units selected from: 0 to 99 mole-% structural units of Formula, 0 to 99 mole-% structural units of Formula, 0 to 99 mole-% structural units of Formula and 0 to 99 mole-% structural units of Formula, wherein R2 is hydrogen or C1-C6 alkyl, A is C2-C4 alkylene groups, and B is C2-C4 alkylene groups with the proviso that A is different from B, and x, y are independently from one another an integer from 1 to 100, R3, R4 are independently from one another hydrogen or C1-C6-alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R5 is hydrogen or C1-C6 alkyl, D is C2-C4 alkylene groups, and Z is an integer from 1 to 50, R6, R7 are independently from one another hydrogen or C1-C6 alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R8 is hydrogen or C1-C6 aklyl, and wherein the structural units,,, and add up to 100 mole-%. 0 to 99 mole-% structural units of Formula, 0 to 99 mole-% structural units of Formula, 0 to 99 mole-% structural units of Formula and 0 to 99 mole-% structural units of Formula, wherein R2 is hydrogen or C1-C6 alkyl, A is C2-C4 alkylene groups, and B is C2-C4 alkylene groups with the proviso that A is different from B, and x, y are independently from one another an integer from 1 to 100, R3, R4 are independently from one another hydrogen or C1-C6-alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R5 is hydrogen or C1-C6 alkyl, D is C2-C4 alkylene groups, and Z is an integer from 1 to 50, R6, R7 are independently from one another hydrogen or C1-C6 alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R8 is hydrogen or C1-C6 aklyl, and wherein the structural units,,, and add up to 100 mole-%. R2 is hydrogen or C1-C6 alkyl, A is C2-C4 alkylene groups, and B is C2-C4 alkylene groups with the proviso that A is different from B, and x, y are independently from one another an integer from 1 to 100, R3, R4 are independently from one another hydrogen or C1-C6-alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R5 is hydrogen or C1-C6 alkyl, D is C2-C4 alkylene groups, and Z is an integer from 1 to 50, R6, R7 are independently from one another hydrogen or C1-C6 alkyl, or, when including the nitrogen atom and the carbonyl group, form a ring having 5, 6, or 7 ring atoms, R8 is hydrogen or C1-C6 aklyl, and