A coating material includes: (A) a compound of formula (I) Ra4-nSiXan  (I), wherein: Xa is a hydrolysable radical; Ra is a non-hydrolysable radical; n is 2, 3 or 4; (B) a compound of formula (II) wherein: Xb is a hydrolysable radical; Rb is a non-hydrolysable radical without an epoxide function, an acryloxy function, a methacryloxy function and an isocyanate function; Yb is a non-hydrolysable radical with a crosslinkable function; p is 2 or 3; q is 1 or 2; the sum of p and q is less than or equal to 4; (C) a crosslinking agent; (D) an organozirconium, organotitanium or organoaluminum compound containing hydrolysable organic radicals; (E) a hydrolysis catalyst; (F) crosslinkable prepolymers of epoxy and epoxysiloxane resins, (G) optional corrosion inhibitors; (H) optional compounds for reducing the reactivity of component (D); wherein n and the sum of p +q are not at the same time each 4.