An antimicrobial composition and a kit comprising at least one quaternary ammonium silicone compound (Si-QAC) and at least one curing agent and optionally further comprising a wetting agent and/or at least one primer and/or a cross-linker being a polyphenol containing at least two hydroxyl groups their use and a method thereof for cleaning and/or disinfecting surfaces, preferably for the long-term antimicrobial protection of hard surfaces, preferably indoor surfaces are disclosed.