Our company is a member of a consortium called “Centre for alternative environment friendly high effective polymer antimicrobial agents for industrial applications” – AlterBio (led by SYNPO, a. s.), which was awarded in the “Visionaries 2021” competition organised by the CzechInno association. Our cooperation with SYNPO resulted in a special polyurethane coating for waterproofing roof membranes, which is tested directly in the field. Flat roofs with the FATRAFOL-S roof waterproofing system were chosen as test areas. The aim of the test is to achieve a longer service life and reduce membrane soiling by applying a coat. The coating was coloured to RAL 5005 and applied at the Napajedla plant in the form of the Fatra logo.