Sandtex Fungicidal Wash is a ready-to-use formula designed for the treatment and removal of mould, algal, fungal, or lichen growth. It effectively kills mould, algae, and fungal growth, making it ideal for preparing mouldy surfaces prior to decorating with masonry paint. This versatile wash can be used on exterior walls, paths, patios, and decking, and also functions as an anti-fungal wood treatment. Ensure thorough surface preparation before use and always read the label.