A polymer comprising a cross-linked reaction product of the FPOSS prepolymer of the formula and a polysiloxane of formula, wherein the FPOSS prepolymer of the formula is: in which X is (CH 2) 2 OC NH(CH 2) 2 OC CH (CH 2) 4 NCO (lysine triisocyanate FPOSS) or optionally substituted C 1-20 alkyl comprising at least two isocyanate groups which may be optionally interrupted by O, CH 2 O, Si, NH, NR 11, C=O, CH, NH, CR, CH 2) n or CO 2; R is independently selected from the group consisting of a polyisocyanate and optionally substituted C 1-20 alkyl which may be optionally interrupted with O, C=O, N=C=O, CH, CH 2 OR 11, CH 2 SR 11 and (CH 2) m (CF 2) n CF 3 provided that at least one R is (CH 2) m (CF 2) n CF 3; m is 1 to 20; n is 0 to 20; and R 11 is H or optionally substituted C 1-16 alkyl; and wherein the polysiloxane of formula is: in which R 14 to R 19 are independently selected from the group consisting of hydrogen; optionally substituted C 1-16 alkyl optionally interrupted with a group selected from NR 24, C=O, C=C, S, CO 2, O and CH; OSiR 25 3; (CH 2) n OH; (CH 2) n O(CH 2) n OH; (CH 2) n NR 24 R 25; (CH 2) n NH(CH 2) n NR 24 R 25; (CH 2) n O(CH 2) n NR 24 R 25; (CH 2) n NCO; epoxy; optionally substituted C 1-16 alkylaryl; optionally substituted aryl; optionally substituted polyaryl; optionally substituted C 3-6 cycloaliphatic; and optionally substituted C 3-6 heterocyclyl; R 20 and R 21 are independently absent or independently selected from the group consisting of optionally substituted C 1-16 alkyl optionally interrupted with a group selected from NR 24, C=O, C=C, S, CO 2, O and CH; O; S; OSi(R 26) 2; (CH 2) n; (CH 2) n NH; (CH 2) n O; optionally substituted C 1-16 alkylaryl; optionally substituted aryl; optionally substituted polyaryl; optionally substituted C 3-6 cycloaliphatic; and optionally substituted C 3-6 heterocyclyl; R 22 and R 23 are independently selected from the group consisting of H, OH, NR 11 R 12, optionally substituted C 1-16 alkyl, NCO, epoxy and Si(R 13) 3; R 24 and R 25 are independently selected from the group consisting of H and optionally substituted C 1-16 alkyl; R 26 is selected from the group consisting of optionally substituted C 1-16 alkyl, (CH 2) n OH and (CH 2) n NH 2; n is 1 to 16; p and r are independently selected from 1 to 1500; and q is 0 to 1500and optionally a polyol, a polyamine and a reactive coating. in which X is (CH 2) 2 OC NH(CH 2) 2 OC CH (CH 2) 4 NCO (lysine triisocyanate FPOSS) or optionally substituted C 1-20 alkyl comprising at least two isocyanate groups which may be optionally interrupted by O, CH 2 O, Si, NH, NR 11, C=O, CH, NH, CR, CH 2) n or CO 2; R is independently selected from the group consisting of a polyisocyanate and optionally substituted C 1-20 alkyl which may be optionally interrupted with O, C=O, N=C=O, CH, CH 2 OR 11, CH 2 SR 11 and (CH 2) m (CF 2) n CF 3 provided that at least one R is (CH 2) m (CF 2) n CF 3; m is 1 to 20; n is 0 to 20; and R 11 is H or optionally substituted C 1-16 alkyl; R 14 to R 19 are independently selected from the group consisting of hydrogen; optionally substituted C 1-16 alkyl optionally interrupted with a group selected from NR 24, C=O, C=C, S, CO 2, O and CH; OSiR 25 3; (CH 2) n OH; (CH 2) n O(CH 2) n OH; (CH 2) n NR 24 R 25; (CH 2) n NH(CH 2) n NR 24 R 25; (CH 2) n O(CH 2) n NR 24 R 25; (CH 2) n NCO; epoxy; optionally substituted C 1-16 alkylaryl; optionally substituted aryl; optionally substituted polyaryl; optionally substituted C 3-6 cycloaliphatic; and optionally substituted C 3-6 heterocyclyl; R 20 and R 21 are independently absent or independently selected from the group consisting of optionally substituted C 1-16 alkyl optionally interrupted with a group selected from NR 24, C=O, C=C, S, CO 2, O and CH; O; S; OSi(R 26) 2; (CH 2) n; (CH 2) n NH; (CH 2) n O; optionally substituted C 1-16 alkylaryl; optionally substituted aryl; optionally substituted polyaryl; optionally substituted C 3-6 cycloaliphatic; and optionally substituted C 3-6 heterocyclyl; R 22 and R 23 are independently selected from the group consisting of H, OH, NR 11 R 12, optionally substituted C 1-16 alkyl, NCO, epoxy and Si(R 13) 3; R 24 and R 25 are independently selected from the group consisting of H and optionally substituted C 1-16 alkyl; R 26 is selected from the group consisting of optionally substituted C 1-16 alkyl, (CH 2) n OH and (CH 2) n NH 2; n is 1 to 16; p and r are independently selected from 1 to 1500; and q is 0 to 1500and optionally a polyol, a polyamine and a reactive coating.