A composition comprising: (a) at least one mercapto-functional silicon compound having the general formula: wherein A is -OR 3, -OCR 2 2 (CR 2 2) f CR 2 2 OH, or and B is H, or wherein each occurrence of Z is independently selected from the group consisting of -OR 3, -OCR 2 2 (CR 2 2) f CR 2 2 OH, and wherein each occurrence of R 1 is a divalent group independently selected from the group consisting of alkylene having 1 to 10 carbon atoms, cycloalkylene having from 5 to 12 carbon atoms, phenylene, and aralkyl having 6 to 10 carbon atoms; wherein each occurrence of R 2 is a monovalent group independently selected from the group consisting of alkyl having 1 to 4 carbon atoms and hydrogen; wherein each occurrence of R 3 is independently selected from the group consisting of hydrogen, alkyl having 1 to 12 carbon atoms, a cycloalkyl having 5 to 12 carbon atoms, phenyl and benzyl; wherein each occurrence of the subscript f is independently an integer from 0 to 4; and wherein the subscript n is an integer from 0 to 15, with the proviso that when n is 0, then B is and/or a partial hydrolyzate or condensate thereof having the general formula: wherein A, B, R 1 and Z are defined above and the subscript n 1 is an integer from 2 to 15; (b) a reactive resin having at least one epoxy group and/or at least one (meth)acrylate group. (a) at least one mercapto-functional silicon compound having the general formula: wherein A is -OR 3, -OCR 2 2 (CR 2 2) f CR 2 2 OH, or and B is H, or wherein each occurrence of Z is independently selected from the group consisting of -OR 3, -OCR 2 2 (CR 2 2) f CR 2 2 OH, and wherein each occurrence of R 1 is a divalent group independently selected from the group consisting of alkylene having 1 to 10 carbon atoms, cycloalkylene having from 5 to 12 carbon atoms, phenylene, and aralkyl having 6 to 10 carbon atoms; wherein each occurrence of R 2 is a monovalent group independently selected from the group consisting of alkyl having 1 to 4 carbon atoms and hydrogen; wherein each occurrence of R 3 is independently selected from the group consisting of hydrogen, alkyl having 1 to 12 carbon atoms, a cycloalkyl having 5 to 12 carbon atoms, phenyl and benzyl; wherein each occurrence of the subscript f is independently an integer from 0 to 4; and wherein the subscript n is an integer from 0 to 15, with the proviso that when n is 0, then B is and/or a partial hydrolyzate or condensate thereof having the general formula: wherein A, B, R 1 and Z are defined above and the subscript n 1 is an integer from 2 to 15; wherein each occurrence of R 1 is a divalent group independently selected from the group consisting of alkylene having 1 to 10 carbon atoms, cycloalkylene having from 5 to 12 carbon atoms, phenylene, and aralkyl having 6 to 10 carbon atoms; wherein each occurrence of R 2 is a monovalent group independently selected from the group consisting of alkyl having 1 to 4 carbon atoms and hydrogen; wherein each occurrence of R 3 is independently selected from the group consisting of hydrogen, alkyl having 1 to 12 carbon atoms, a cycloalkyl having 5 to 12 carbon atoms, phenyl and benzyl; wherein each occurrence of the subscript f is independently an integer from 0 to 4; and wherein the subscript n is an integer from 0 to 15, with the proviso that when n is 0, then B is and/or a partial hydrolyzate or condensate thereof having the general formula: wherein A, B, R 1 and Z are defined above and the subscript n 1 is an integer from 2 to 15; (b) a reactive resin having at least one epoxy group and/or at least one (meth)acrylate group.