By using Mundex W955 Plus, flexible surfaces as nonwovens, technical textiles, papers and cardboard can be given an antimicrobial finish without the use of biocides. Conventional application methods such as spraying, dipping, doctoring, foaming or padding are used. In this way, antimicrobial-finished filter media (e.g. air or water filters), textiles (e.g. antimicrobial-finished clothing) and papers (e.g. for packaging materials) can be produced.