Abstract: The invention relates to a two-component coating agent on an epoxy resin base, comprising a resin component A and a hardener component B, characterized in that the resin component A consists of between (15 and 18) weight percent, in relation to component A, of an epoxy resin and at least one additional component, chosen from among a reactive diluent, a filler, and other ingredients such as pigments, additives and extenders, that the hardener component B consists of between 20 and 50 weight percent, in relation to component B, of m-xylyl endiamine and at least one other component, chosen from among an adductor resin, an extender and an accelerator, and in that components A and B are present at a molar ratio of 1:0.8 to 1.2. The coating agent, which in addition to the two main components can also contain as much as 15 times their weight in aggregates having a particle size of up to 3.