A heat-curing epoxy resin compositions which can in particular be used as bodyshell adhesives for motor vehicle construction. The heat-curing epoxy resin compositions contain a curing agent which can be activated through elevated temperature and has a first component K1 containing at least one epoxy resin and a second component K2 containing at least one tertiary amine and also a primary amine. These compositions, after short-term heating of 30 to 120 seconds at a temperature of 90° C. to 130° C., exhibit sufficient strength and adhesion to withstand transport-induced mechanical strains.