An aminosiloxane/alkyl silane blend for imparting hydrophobicity to hair, comprising: (a) 0.2 to 15 wt% of a cosmetically acceptable condensation catalyst selected from the group consisting of organic titanates, organic zirconates and mixtures thereof; (b) 1 to 20 wt% of a cosmetically acceptable aminosiloxane of formula wherein each R 1 is independently selected from the group consisting of a C 1-30 alkyl group, a C 1-30 alkoxy group, a C 5-30 aryl group, a C 6-30 aralkyl group, a C 6-30 aralkyloxy group, a C 1-30 alkaryl group, a C 1-30 alkoxyaryl group, and a hydroxy group; wherein R 2 is a divalent alkylene radical having one to ten carbon atoms; wherein each R 3 is independently selected from the group consisting of a C 1-30 alkyl group, a C 5-30 aryl group, a C 6-30 aralkyl group and a C 1-30 alkaryl group; wherein Q is a monovalent radical selected from the group consisting of -NR 4 2 and -NR 4 (CH 2) x NR 4 2; wherein each R 4 is independently selected from the group consisting of a hydrogen and a C 1-4 alkyl group; wherein x is 2 to 6; wherein z is 0 or 1; wherein n is 25 to 3,000; and wherein m is 0 to 3,000; with the proviso that at least 50 mol% of the total number of R 1 and R 3 groups are methyl and with the proviso that when m is 0, z is 1; (c) 5 to 75 wt% of a cosmetically acceptable alkyl silane of formula wherein a is selected from 0 and 1; wherein R 5 is a C 2-10 alkyl group with an addition reaction functional moiety selected from an epoxide group and a vinyl group; and wherein each R 6 is independently selected from a C 1-4 alkyl group; and (d) 15 to 93.8 wt% of a cosmetically acceptable polydimethylsiloxane of formula wherein n is an average of 0 to 150. (a) 0.2 to 15 wt% of a cosmetically acceptable condensation catalyst selected from the group consisting of organic titanates, organic zirconates and mixtures thereof; (b) 1 to 20 wt% of a cosmetically acceptable aminosiloxane of formula wherein each R 1 is independently selected from the group consisting of a C 1-30 alkyl group, a C 1-30 alkoxy group, a C 5-30 aryl group, a C 6-30 aralkyl group, a C 6-30 aralkyloxy group, a C 1-30 alkaryl group, a C 1-30 alkoxyaryl group, and a hydroxy group; wherein R 2 is a divalent alkylene radical having one to ten carbon atoms; wherein each R 3 is independently selected from the group consisting of a C 1-30 alkyl group, a C 5-30 aryl group, a C 6-30 aralkyl group and a C 1-30 alkaryl group; wherein Q is a monovalent radical selected from the group consisting of -NR 4 2 and -NR 4 (CH 2) x NR 4 2; wherein each R 4 is independently selected from the group consisting of a hydrogen and a C 1-4 alkyl group; wherein x is 2 to 6; wherein z is 0 or 1; wherein n is 25 to 3,000; and wherein m is 0 to 3,000; with the proviso that at least 50 mol% of the total number of R 1 and R 3 groups are methyl and with the proviso that when m is 0, z is 1; wherein each R 1 is independently selected from the group consisting of a C 1-30 alkyl group, a C 1-30 alkoxy group, a C 5-30 aryl group, a C 6-30 aralkyl group, a C 6-30 aralkyloxy group, a C 1-30 alkaryl group, a C 1-30 alkoxyaryl group, and a hydroxy group; wherein R 2 is a divalent alkylene radical having one to ten carbon atoms; wherein each R 3 is independently selected from the group consisting of a C 1-30 alkyl group, a C 5-30 aryl group, a C 6-30 aralkyl group and a C 1-30 alkaryl group; wherein Q is a monovalent radical selected from the group consisting of -NR 4 2 and -NR 4 (CH 2) x NR 4 2; wherein each R 4 is independently selected from the group consisting of a hydrogen and a C 1-4 alkyl group; wherein x is 2 to 6; wherein z is 0 or 1; wherein n is 25 to 3,000; and wherein m is 0 to 3,000; (c) 5 to 75 wt% of a cosmetically acceptable alkyl silane of formula wherein a is selected from 0 and 1; wherein R 5 is a C 2-10 alkyl group with an addition reaction functional moiety selected from an epoxide group and a vinyl group; and wherein each R 6 is independently selected from a C 1-4 alkyl group; and wherein a is selected from 0 and 1; wherein R 5 is a C 2-10 alkyl group with an addition reaction functional moiety selected from an epoxide group and a vinyl group; and wherein each R 6 is independently selected from a C 1-4 alkyl group; and (d) 15 to 93.8 wt% of a cosmetically acceptable polydimethylsiloxane of formula wherein n is an average of 0 to 150.