This 5ltr Clear Sandtex Trade Fungicidal Wash is a high-performance, ready-to-use formula for the treatment and removal of mould, algae, fungal or lichen growth on exterior walls, paths, patios and decking. This multi-purpose fungicidal wash can be used to remove mould from masonry walls before applying paint and can also be used as an anti-fungal wood treatment. Thorough surface preparation is essential before use of the fungicidal wash - read the label before use.