Nonaqueous coating material composition comprising at least one polyhydroxyl-group-containing compound, at least one polyisocyanate-group-containing compound having free or blocked isocyanate groups, and at least one catalyst for the crosslinking of silane groups, where component comprises at least one structural unit of the formula -NR-(X-SiR''x(OR')3-x), and at least one structural unit of the formula -N(X-SiR''x(OR')3-x)n(X'-SiR''y(OR')3-y)m, where R = alkyl, cycloalkyl, aryl or aralkyl, it being possible for the carbon chain to be interrupted by nonadjacent oxygen, sulfur or NRa groups, where Ra = alkyl, cycloalkyl, aryl or aralkyl, R' = hydrogen, alkyl or cycloalkyl it being possible for the carbon chain to be interrupted by nonadjacent oxygen, sulfur or NRa groups, where Ra = alkyl, cycloalkyl, aryl or aralkyl, X, X' = linear and/or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, R'' = alkyl, cycloalkyl, aryl or aralkyl, it being possible for the carbon chain to be interrupted by nonadjacent oxygen, sulfur or NRa groups, where Ra = alkyl, cycloalkyl, aryl or aralkyl, n = 0 to 2, m = 0 to 2, m+n = 2, and x, y = 0 to 2, with the provisos that (i) in component more than 30 mol% and less than 70 mol% of the originally present isocyanate groups have undergone reaction to form structural units plus, (ii) in component more than 25 and less than 36 mol% of the originally present isocyanate groups have undergone reaction to form structural units, and (iii) the coating material composition comprises as component at least one polyisocyanate-group-containing compound having free or blocked isocyanate groups and having an acyclic, aliphatic polyisocyanate parent structure and/or a polyisocyanate parent structure that is derived from one such acyclic aliphatic polyisocyanate by trimerization, dimerization, urethane formation, biuret formation, uretdione formation and/or allophanate formation, excluding a coating material composition as per Example B4 from WO 2011/131463 A1. at least one polyhydroxyl-group-containing compound, at least one polyisocyanate-group-containing compound having free or blocked isocyanate groups, and at least one catalyst for the crosslinking of silane groups, R = alkyl, cycloalkyl, aryl or aralkyl, it being possible for the carbon chain to be interrupted by nonadjacent oxygen, sulfur or NRa groups, where Ra = alkyl, cycloalkyl, aryl or aralkyl, R' = hydrogen, alkyl or cycloalkyl it being possible for the carbon chain to be interrupted by nonadjacent oxygen, sulfur or NRa groups, where Ra = alkyl, cycloalkyl, aryl or aralkyl, X, X' = linear and/or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, R'' = alkyl, cycloalkyl, aryl or aralkyl, it being possible for the carbon chain to be interrupted by nonadjacent oxygen, sulfur or NRa groups, where Ra = alkyl, cycloalkyl, aryl or aralkyl, n = 0 to 2, m = 0 to 2, m+n = 2, and x, y = 0 to 2, (i) in component more than 30 mol% and less than 70 mol% of the originally present isocyanate groups have undergone reaction to form structural units plus, (ii) in component more than 25 and less than 36 mol% of the originally present isocyanate groups have undergone reaction to form structural units, and (iii) the coating material composition comprises as component at least one polyisocyanate-group-containing compound having free or blocked isocyanate groups and having an acyclic, aliphatic polyisocyanate parent structure and/or a polyisocyanate parent structure that is derived from one such acyclic aliphatic polyisocyanate by trimerization, dimerization, urethane formation, biuret formation, uretdione formation and/or allophanate formation, excluding a coating material composition as per Example B4 from WO 2011/131463 A1.