A cosmetic agent for treating a keratinous material, the agent comprising a) at least one organosilicon compound, wherein the at least one organosilicon compound contains a compound of formula and at least one organosilicon compound of formula, where, in the organosilicon compound of formula, R 1 R 2 N-L-Si(OR 3) a (R 4) b, - R 1 and R 2 both represent a hydrogen atom, - L represents a linear, divalent C 1 -C 6 alkylene group, preferably a propylene group (-CH 2 -CH 2 -CH 2 -) or an ethylene group (-CH 2 -CH 2 -), - R 3 and R 4 independently represent a methyl group or an ethyl group, - a represents the number 3, and - b represents the number 0, and where, in the organosilicon compound of formula, R 9 Si(OR 10) k (R 11) m, - R 9 represents a C 1 -C 12 -alkyl group, - R 10 represents a hydrogen atom or a C 1 -C 6 alkyl group, - R 11 represents a C 1 -C 6 alkyl group, - k represents an integer from 1 to 3, and - m represents the integer 3 - k, which contains one to three silicon atoms, and b) at least one polyacrylate copolymer formed by the monomers acrylic acid and acrylamidopropyltrimonium chloride. a) at least one organosilicon compound, wherein the at least one organosilicon compound contains a compound of formula and at least one organosilicon compound of formula, where, in the organosilicon compound of formula, R 1 R 2 N-L-Si(OR 3) a (R 4) b, - R 1 and R 2 both represent a hydrogen atom, - L represents a linear, divalent C 1 -C 6 alkylene group, preferably a propylene group (-CH 2 -CH 2 -CH 2 -) or an ethylene group (-CH 2 -CH 2 -), - R 3 and R 4 independently represent a methyl group or an ethyl group, - a represents the number 3, and - b represents the number 0, and where, in the organosilicon compound of formula, R 9 Si(OR 10) k (R 11) m, - R 9 represents a C 1 -C 12 -alkyl group, - R 10 represents a hydrogen atom or a C 1 -C 6 alkyl group, - R 11 represents a C 1 -C 6 alkyl group, - k represents an integer from 1 to 3, and - m represents the integer 3 - k, which contains one to three silicon atoms, and where, in the organosilicon compound of formula, R 1 R 2 N-L-Si(OR 3) a (R 4) b, - R 1 and R 2 both represent a hydrogen atom, - L represents a linear, divalent C 1 -C 6 alkylene group, preferably a propylene group (-CH 2 -CH 2 -CH 2 -) or an ethylene group (-CH 2 -CH 2 -), - R 3 and R 4 independently represent a methyl group or an ethyl group, - a represents the number 3, and - b represents the number 0, and - R 1 and R 2 both represent a hydrogen atom, - L represents a linear, divalent C 1 -C 6 alkylene group, preferably a propylene group (-CH 2 -CH 2 -CH 2 -) or an ethylene group (-CH 2 -CH 2 -), - R 3 and R 4 independently represent a methyl group or an ethyl group, - a represents the number 3, and - b represents the number 0, and where, in the organosilicon compound of formula, R 9 Si(OR 10) k (R 11) m, - R 9 represents a C 1 -C 12 -alkyl group, - R 10 represents a hydrogen atom or a C 1 -C 6 alkyl group, - R 11 represents a C 1 -C 6 alkyl group, - k represents an integer from 1 to 3, and - m represents the integer 3 - k, which contains one to three silicon atoms, and - R 9 represents a C 1 -C 12 -alkyl group, - R 10 represents a hydrogen atom or a C 1 -C 6 alkyl group, - R 11 represents a C 1 -C 6 alkyl group, - k represents an integer from 1 to 3, and - m represents the integer 3 - k, which contains one to three silicon atoms, and b) at least one polyacrylate copolymer formed by the monomers acrylic acid and acrylamidopropyltrimonium chloride.