Our ready-to-use path and patio cleaner clean up to 33 square metres. This surface biocide is for amateur use against algae, mould and lichen. This non-acid-based exterior hard surface cleaner can be used on a wide range of hard surfaces such as brick, tarmac, asphalt, block paving, concrete and stone. Unlike acid-based treatments, this formula uses chemicals to clean instead of corroding away the surface. It's specially formulated to remove a wide range of stains from exterior surfaces such as paths, driveways, patios and walls. Use only as directed and read all safety instructions before use. Size: 5L.