Increasing the stability of agents for the treatment of keratinous material

A method for treating keratinous material, the method comprising applying the following to the keratinous material:

• a first composition (A) comprising, relative to the total weight of the first composition (A)
• (A1) less than about 10% by weight of water, and
• (A2) one or more organic C1-C6 alkoxy silanes of the formula (S-I) and/or their condensation products and one or more organic C1-C6 alkoxy silanes of the formula (S-IV) and/or their condensation products,
• R1R2N-L-Si(OR3)a(R4)b (S-I),
• where
• R1, R2 each independently represent a hydrogen atom or a C1-C6 alkyl group,
• L is a linear or branched divalent C1-C20 alkylene group,
• each R3, R4 independently represents a C1-C6 alkyl group,
• a represents an integer from 1 to 3, and
• b is an integer equal to 3-a;
• R9Si(OR10)k(R11)m (S-IV),
• where
• R9 represents a C1-C12 alkyl group,
• R10 stands for a C1-C6 alkyl group,
• R11 stands for a C1-C6 alkyl group,
• k is an integer from 1 to 3, and
• m stands for the integer 3-k;
• and
• a second composition (B) comprising
• (B1) water, and
• (B2) one or more alkylene glycols of formula (AG-Ia)
• where x is an integer from 4 to 60.