A coating system for floors, containing a) one or more agents in which, together or separately, a polymer or polymer/wax dispersion and aziridine and, where desired, a flatting component are present, for application on the floor in order to form a crosslinked base film that is not capable of being removed by wet chemical means, as well as b) an aziridine-free agent containing conventional floor-maintenance components, in particular a polymer or polymer/wax dispersion, for the purpose of generating a sacrificial film on said base film that is capable of being removed by wet chemical means.