The present invention relates to a lacquer composition, particularly an adhesive and corrosion-protective lacquer for rare earth magnets, on the basis of an epoxy resin mixture, a setting accelerator, a silane-based epoxy functional adhesion promoter and a solvent or a solvent mixture, wherein the lacquer composition includes 5 to 20 wt. %, with respect to the amount of solid resin in the base of the epoxy resin mixture, of a highly viscous epoxy resin based on bisphenol-A with an elastomer content of more than 30 wt. %.