When applied as single-component coating, both ChDs and MFC have positive influence on the mechanical strength properties (e.g. tensile energy absorption TEA increases by 19% for the CCh and by about 10% for MFC, QCh and Ach). However, like in the case of water barrier, composite coatings produce a lower improvement in strength indexes than individual coatings, confirming that MFC impairs the uniformity of coating layers.