Concentrated Path & Patio Cleaner is a non-acid based exterior hard surface cleaner which can be used on a wide range of surfaces such as brick, tarmac, asphalt, block paving, concrete and stone. The concentrate is especially formulated to remove a wide range of stains and soils from exterior surfaces such as paths, driveways, patios and walls.Contains Cationic Surfactant and Sodium Tripolyphosphate.Comes in a 2 litre concentrate carton.