A composition comprising: a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula R 1 R 2 N-P (NH 2) 2, wherein X is oxygen or sulfur; R 1 is a C 1 to C 20 alkyl, C 3 to C 20 cycloalkyl, C 6 to C 20 aryl, or dialkylaminocarbonyl group; R 2 is H, or R 1 and R 2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and at least one amine selected from the group consisting of or: polyethyleneimine according to the general formula which has an average molar mass of from 200 to 1,000,000 g/mol and in which R 1 to R 6 are - independently from each other - hydrogen, linear or branched C 1 - to C 20 -alkyl, -alkoxy, -polyoxyalkylene, -polyoxyethylene, -hydroxyalkyl, -(alkyl)carboxy, -phosphonoalkyl, -alkylamino radicals, C 2 - to C 20 -alkenyl radicals or C 6 - to C 20 -aryl, -aryloxy, -hydroxyaryl, -arylcarboxy or -arylamino radicals which are optionally further substituted, and R 2, R 3 and R 5 may - independently from each other - optionally be each additionally further polyethyleneimine polymer chains, and R 1 may optionally be an NR 3 R 4 or an NH 2 radical, and x, y and z are - independently from each other - 0 or an integer, wherein the sum of x, y and z must be chosen in such a way that the average molar mass is within the specified range; polyethyleneimine according to the general formula wherein at least one of the radicals R 2 to R 6 is a polyoxyalkylene radical, and further comprising a mixture of propane-1,2-diol (alpha-propylene glycol) and DMSO. a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula R 1 R 2 N-P (NH 2) 2, wherein X is oxygen or sulfur; R 1 is a C 1 to C 20 alkyl, C 3 to C 20 cycloalkyl, C 6 to C 20 aryl, or dialkylaminocarbonyl group; R 2 is H, or R 1 and R 2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and X is oxygen or sulfur; R 1 is a C 1 to C 20 alkyl, C 3 to C 20 cycloalkyl, C 6 to C 20 aryl, or dialkylaminocarbonyl group; R 2 is H, or R 1 and R 2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, at least one amine selected from the group consisting of or: polyethyleneimine according to the general formula which has an average molar mass of from 200 to 1,000,000 g/mol and in which R 1 to R 6 are - independently from each other - hydrogen, linear or branched C 1 - to C 20 -alkyl, -alkoxy, -polyoxyalkylene, -polyoxyethylene, -hydroxyalkyl, -(alkyl)carboxy, -phosphonoalkyl, -alkylamino radicals, C 2 - to C 20 -alkenyl radicals or C 6 - to C 20 -aryl, -aryloxy, -hydroxyaryl, -arylcarboxy or -arylamino radicals which are optionally further substituted, and R 2, R 3 and R 5 may - independently from each other - optionally be each additionally further polyethyleneimine polymer chains, and R 1 may optionally be an NR 3 R 4 or an NH 2 radical, and x, y and z are - independently from each other - 0 or an integer, wherein the sum of x, y and z must be chosen in such a way that the average molar mass is within the specified range; polyethyleneimine according to the general formula wherein at least one of the radicals R 2 to R 6 is a polyoxyalkylene radical, polyethyleneimine according to the general formula which has an average molar mass of from 200 to 1,000,000 g/mol and in which R 1 to R 6 are - independently from each other - hydrogen, linear or branched C 1 - to C 20 -alkyl, -alkoxy, -polyoxyalkylene, -polyoxyethylene, -hydroxyalkyl, -(alkyl)carboxy, -phosphonoalkyl, -alkylamino radicals, C 2 - to C 20 -alkenyl radicals or C 6 - to C 20 -aryl, -aryloxy, -hydroxyaryl, -arylcarboxy or -arylamino radicals which are optionally further substituted, and R 2, R 3 and R 5 may - independently from each other - optionally be each additionally further polyethyleneimine polymer chains, and R 1 may optionally be an NR 3 R 4 or an NH 2 radical, and x, y and z are - independently from each other - 0 or an integer, wherein the sum of x, y and z must be chosen in such a way that the average molar mass is within the specified range; R 1 to R 6 are - independently from each other - hydrogen, linear or branched C 1 - to C 20 -alkyl, -alkoxy, -polyoxyalkylene, -polyoxyethylene, -hydroxyalkyl, -(alkyl)carboxy, -phosphonoalkyl, -alkylamino radicals, C 2 - to C 20 -alkenyl radicals or C 6 - to C 20 -aryl, -aryloxy, -hydroxyaryl, -arylcarboxy or -arylamino radicals which are optionally further substituted, and R 2, R 3 and R 5 may - independently from each other - optionally be each additionally further polyethyleneimine polymer chains, and R 1 may optionally be an NR 3 R 4 or an NH 2 radical, and x, y and z are - independently from each other - 0 or an integer, wherein the sum of x, y and z must be chosen in such a way that the average molar mass is within the specified range; polyethyleneimine according to the general formula wherein at least one of the radicals R 2 to R 6 is a polyoxyalkylene radical, and further comprising a mixture of propane-1,2-diol (alpha-propylene glycol) and DMSO.