The invention relates to organosilane-modified polysiloxanes of the following formula: where x=0 to 200, y=5 to 100, z=0 to 50 and p=1 to 25; R1, R2, R3, R4 and R5 independently of one another are saturated or unsaturated, straight-chain or branched alkyl radicals having 1 to 4 carbon atoms and/or aryl radicals having 6 to 9 carbon atoms; R6 is a straight-chain or branched alkyl radical having 6 to 22 carbon atoms; R7 is a radical —(CH2)s-M-Z, where s is 2 to 20, M is an aliphatic group containing at least one —O—CO— or —CO—O— group and optionally ether groups, and Z is hydrogen, —CO—CH3 or a straight-chain or branched alkyl radical having 1 to 4 carbon atoms; R8 is a radical —(CH2)n—Si(R11)v(R12)3-v, where v is 0, 1 or 2, n is 2 to 16, R11 is a straight-chain or branched alkyl radical having 1 to 4 carbon atoms, and R12 is a radical selected from the group OR13, O—CO—R13, halogen or haloalkyl having 1 to 6 carbon atoms, in which R13 is an aromatic radical or a straight-chain, branched or cyclic alkyl radical having 1 to 6 carbon atoms and optionally containing ether and/or thioether groups; and R9 and R10 independently of one another possess the definition of R1, R2, R3, R4, R5, R6, R7 or R8. The invention additionally relates to the use of the organo-modified polysiloxanes for surface coating, and to their preparation.