The present invention provides a fluorochemical composition comprising: (a) one or more fluorochemical oligomers derivable from a free radical polymerization of one or more fluorinated monomers and optionally one or more non-fluorinated monomers in the presence of a chain transfer agent, said fluorochemical oligomer being free of acid groups and comprising one or more groups of the formula: -M.sup.1(R).sub.q(Y).sub.p-q-1 (I) wherein M.sup.1 is selected from the group consisting of Si, Ti, Zr, B, Al, Ge, V, Pb, Sn and Zn, R represents a non-hydrolysable group, Y represents a hydrolysable group, q is 0, 1 or 2, p equals the valence of M.sup.1 and is 3 or 4 and p-q-1 is at least 1; (b) one or more non-fluorinated compounds of an element M.sup.2 selected from the group consisting of Si, Ti, Zr, B, Al, Ge, V, Pb, Sn and Zn and having at least two hydrolysable groups per molecule in an amount sufficient to form a polycondensation product upon reaction with said fluorochemical oligomer (a); (c) water; and (d) an organic solvent in an amount sufficient to dissolve and/or disperse components (a), (b) and (c).The invention also provides compositions comprising condensates of components (a) and (b) of the above composition and a method of treatment of substrates therewith.