Jointing compounds with improved resilience

A jointing compound for the permanent closure of joints and having the ability to expand and contract with changes in joint width as a result of weather conditions, said compound consisting essentially of jointing compound additives and at least one binder consisting of vinyl ester-ethylene copolymers in the form of their aqueous dispersions or of water-redispersible powders optionally with other additives, wherein the vinyl ester-ethylene copolymers contain from 5 to 50% by weight of ethylene based on the total weight of the copolymer, wherein the vinyl ester is a vinyl ester of an alkylcarboxylic acid having from 1 to 12 carbon atoms or mixtures thereof, and wherein the jointing compounds contain from 0.01 to 1.0% by weight, based on the total weight of the jointing compound, of alkylalkoxysilanes of the general formula SiRn(OR′)4−n where n is 1 to 3, R′ represents identical or different alkyl radicals or monoalkyl glycol radicals having 1 to 8 carbon atoms and R represents identical or different alkyl radicals having 1 to 8 carbon atoms optionally substituted with chlorine or a glycidoxy group.