Spear and Jackson Ready To Use Black Spot Remover * Remove black spot from block paving, concrete or natural stone * 5 litres of product will clean and treat approximately 25 m sq * Helps to lift and clean dirt and grime from areas that haven't been treated for years - you'll have them looking brand new once more with this powerful black spot destroying solution * Ready to use formulation which powers through patio black spots, lichen, algae and stains using this easy application formula. * Read all label instructions before use Black Spot Remover is a ready to use formulation which powers through patio black spots, lichen, algae and stains using this easy application formula. The deep cleaning solution works on a wide range of outdoor surfaces to lift and clean, keeping your patio, garden, path, and driveway looking their best all year round. Directions for use: Read all label instructions before use The product is ready to use and applied neat through a plastic watering can or sprayable equipment. Always test in a small inconspicuous area before using to ensure it is suitable and desired effect is achieved. Ensure that the area to be treated is cleared of garden furniture and other items so that they are not in accidental contact with the product. Ensure that all loose dirt and other physical debris is removed first by brushing prior to application Apply directly to the surface to be treated and leave to soak in, product will begin to react as it gets to work. Leave product on surface between 2 - 4 hours to allow time to work. When sufficient time has been allowed for the product to work, rinse off the area thoroughly. For best results use a pressure washer. Repeat as necessary for badly affected areas. Product can be applied to slightly damp surfaces or dry surfaces. Do not apply to surfaces where they are saturated from recent rainfall or if rain is due within the time 2-4 hours required to treat the surface. Wash hands after use.