A process for preparing a silane-functionalized resin composition comprising the steps of: contacting a polymer backbone P with a compound comprising - S-X wherein P and the compound comprising -S-X are contacted in the presence of a metathesis catalyst, wherein the metathesis catalyst comprises tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene] [3 -phenyl- 1H-inden-1-ylidene]ruthenium dichloride, tricyclohexylphosphine[3-phenyl-1H-inden-1-ylidene][1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydro-imidazol-2-ylidene]ruthenium dichloride, tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene][(phenylthio)methylene]ruthenium dichloride, bis(tricyclohexylphosphine)-3-phenyl-1H-inden-1-ylideneruthenium dichloride, 1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene[2-(i-propoxy)-5-(N,N-dimethylaminosulfonyl)phenyl]methyleneruthenium dichloride, [1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene]-[2-[[(4-methylphenyl)imino]methyl]-4-nitrophenolyl]-[3-phenyl-1H-inden-1-ylidene]ruthenium chloride, and fluoride and bromide derivatives thereof, or a mixture of any of the above; and producing the silane-functionalized resin composition, wherein the functionalized resin composition has the formula P-S-X where S is a spacer selected from at least one of C 2 -C 40 straight chain and branched alkyl, C 6 -C 40 aromatics, and combinations thereof, P is a polymer backbone selected from at least one of dicyclopentadiene (DCPD)-based polymers, cyclopentadiene -based polymers, DCPD-styrene copolymers, C 5 homopolymers and copolymer resins, C 5 -styrene copolymer resins, terpene homopolymer or copolymer resins, pinene homopolymer or copolymer resins, C 9 homopolymers and copolymer resins, C 5 /C 9 copolymer resins, alpha-methylstyrene homopolymer or copolymer resins, and combinations thereof, and X is a silane residue wherein "silane" is defined as any silicon analog of a substituted or unsubstituted hydrocarbon. contacting a polymer backbone P with a compound comprising - S-X wherein P and the compound comprising -S-X are contacted in the presence of a metathesis catalyst, wherein the metathesis catalyst comprises tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene] [3 -phenyl- 1H-inden-1-ylidene]ruthenium dichloride, tricyclohexylphosphine[3-phenyl-1H-inden-1-ylidene][1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydro-imidazol-2-ylidene]ruthenium dichloride, tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene][(phenylthio)methylene]ruthenium dichloride, bis(tricyclohexylphosphine)-3-phenyl-1H-inden-1-ylideneruthenium dichloride, 1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene[2-(i-propoxy)-5-(N,N-dimethylaminosulfonyl)phenyl]methyleneruthenium dichloride, [1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene]-[2-[[(4-methylphenyl)imino]methyl]-4-nitrophenolyl]-[3-phenyl-1H-inden-1-ylidene]ruthenium chloride, and fluoride and bromide derivatives thereof, or a mixture of any of the above; and producing the silane-functionalized resin composition, wherein the functionalized resin composition has the formula P-S-X where S is a spacer selected from at least one of C 2 -C 40 straight chain and branched alkyl, C 6 -C 40 aromatics, and combinations thereof, P is a polymer backbone selected from at least one of dicyclopentadiene (DCPD)-based polymers, cyclopentadiene -based polymers, DCPD-styrene copolymers, C 5 homopolymers and copolymer resins, C 5 -styrene copolymer resins, terpene homopolymer or copolymer resins, pinene homopolymer or copolymer resins, C 9 homopolymers and copolymer resins, C 5 /C 9 copolymer resins, alpha-methylstyrene homopolymer or copolymer resins, and combinations thereof, and X is a silane residue wherein "silane" is defined as any silicon analog of a substituted or unsubstituted hydrocarbon. the functionalized resin composition has the formula P-S-X where S is a spacer selected from at least one of C 2 -C 40 straight chain and branched alkyl, C 6 -C 40 aromatics, and combinations thereof, P is a polymer backbone selected from at least one of dicyclopentadiene (DCPD)-based polymers, cyclopentadiene -based polymers, DCPD-styrene copolymers, C 5 homopolymers and copolymer resins, C 5 -styrene copolymer resins, terpene homopolymer or copolymer resins, pinene homopolymer or copolymer resins, C 9 homopolymers and copolymer resins, C 5 /C 9 copolymer resins, alpha-methylstyrene homopolymer or copolymer resins, and combinations thereof, and X is a silane residue wherein "silane" is defined as any silicon analog of a substituted or unsubstituted hydrocarbon.