Ronseal thompson's advanced patio block paving cleaner is a professional cleaning solution designed to kill moss, mould and algae on most garden surfaces. This powerful cleaner features active ingredients that lift dirt and grime, reviving and brightening paving to restore its original appearance. The cleaner's enhanced moss guard technology forms a protective barrier on treated surfaces, preventing moss and mould regrowth for up to 6 months. This long lasting protection reduces the frequency of cleaning and maintenance required, making it ideal for driveways, patios and block paved areas exposed to damp conditions. Suitable for use on a wide range of garden hard surfaces including concrete paving, natural stone and block paving, this 5 litre container provides coverage of 15 20m² per application, offering excellent value for treating larger outdoor areas. Features and benefits bull kills moss, mould and algae on contact to restore surface appearance bull moss guard technology prevents regrowth for up to 6 months bull active ingredients lift dirt and grime to revive and brighten surfaces bull covers 15 20m² per 5 litre container specifications clean type sealer size l 5