Patent ID: 8752287

Claim:
A method of repairing an engine leak comprising the steps of: locating at least one gas leak in an engine; applying an alkyl polyether composition and a crosslinking composition to at least one surface of the engine within three inches of the located gas leak; allowing a polyether dental impression material to form by reacting the alkyl polyether composition and the crosslinking composition; and allowing the formed polyether dental impression material to seal the located gas leak; wherein the alkyl polyether composition has the formula (L)x-[G-Q-E-NCH 2 CHR] y ; and R is at least one of H, C 1 -C 12 alkyl, C 2 -C 12 alkenyl, C 2 -C 12 alkynyl, C 7 -C 15 arylaklyl, or C 3 -C 12 cycloalkyl; or R is at least one of H, C 1 -C 12 alkyl, C 2 -C 12 alkenyl, C 2 -C 12 alkynyl, C 7 -C 15 arylaklyl, or C 3 -C 12 cycloalkyl and one or more hydrogen atoms on R is each replaced by Cl or F; or R is at least one of H, C 1 -C 12 alkyl, C 2 -C 12 alkenyl, C 2 -C 12 alkynyl, C 7 -C 15 arylaklyl, or C 3 -C 12 cycloalkyl and up to five carbon atoms on R is each replaced by any of O, CO, N, and S; or R is at least one of H, C 1 -C 12 alkyl, C 2 -C 12 alkenyl, C 2 -C 12 alkynyl, C 7 -C 15 arylaklyl, or C 3 -C 12 cycloalkyl and one or more hydrogen atoms on R is each replaced by Cl or F and up to five carbon atoms on R is each replaced by any of O, CO, N, and S; E is a C 1 -C 18 branched or un-branched hydrocarbon chain wherein up to five carbon atoms in the chain is each replaced by any of O and CO; G is at least one of C(O)O, C(O)NR, C(O), C(O)C(O), C(O)(CH 2 ) m , C(O, C(S)NR, and —CH 2 —, wherein m is in the range of 1 to 10; Q is at least one of (—OCH 2 CH 2 —) n or (—OCH 2 CH(CH 3 )—) n , wherein n has an average value of 3 to 200; L is selected from the group consisting of O, S, and NR; x has a value of 0 or 1; and y is at least 1.