Mundex B is a specially modified water-based polymer emulsion based on special polymer mixtures. After curing at 120-180 °C Mundex B shows strongly antimicrobial properties which are exclusively due to hydrophobic interactions of the cured polymer emulsion with the cell membrane of microorganisms. The chemical and physical properties of the polymer coating were largely modelled on the natural structure of microorganisms. This antimicrobial effect is purely physical/mechanical and not due to chemical or ionic interactions. Mundex B is free of biocides and nanoparticles.