Abstract: The invention relates to epoxide resin mixtures hardenable at room temperature, comprised of:(A) Polyepoxides with more than one epoxide group per molecular;(B) Aliphatic or cycloaliphatic polyamines with more than two active hydrogen atoms bound to the nitrogen of the amino groups;(C) A reaction product having mean m.w. 500-8,000 of:(c1) a polyalkylene ether polyol prepared from alkylene oxides and one member selected from the group consisting of di-functional alcohols, polyfunctional alcohols, or mixtures thereof, and(c2) an aliphatic or cycloaliphatic diisocyanate, wherein the NCO : OH ratio is 2:1, and wherein said reaction product is blocked with a certain sterically hindered piperidine derivative; and optionally(D) Customary fillers, pigments, reaction accelerators, and viscosity regulators.