Essential Patio Perfect contains a biocide, which facilitates in the removal of organic substance between slabs and grout, such as weeds, moss, leaf mulch, and so on. Take better care of your lawn and keep in mind to thoroughly rinse off the cleaning product at the end of the cleaning process to minimise the impact on your grass. Most marks, grime, and dirt will fade away with just one application of Essential Patio Perfect; however, depending on the age and condition of your patio, a second application may be required to achieve a "good as new" appearance. Coverage varies depending on surface contamination, but when diluted 1:1, it should cover up to 50m2 per 5L. Available in 5L and 25L. HOW TO APPLY: 1. Remove any dust and debris from the work surface before beginning, and make sure you have adequate personal protection, such as gloves , appropriate protective eyewear , a face mask , and clothing. 2. Make a 1:1 solution of Essential Patio Perfect cleaner and clean water, taking care not to spill the cleaner on sensitive surfaces such as fabrics. Transfer the cleaning fluid from the bottle to a pump sprayer or watering can with care. If none of these containers are available, cleaning fluid can be used directly from the bucket. Apply liberally. 3. The cleaning fluid should be left on the area for at least an hour, and the surface must not be allowed to dry during that time. If absolutely required, sprinkle the paving with additional cleaning fluid or clean water to keep it from drying out. If necessary, use a brush to work the staining area(s), but keep the surface wet at all times. For best results, after at least one hour of residence time, the treated area should be washed down with clean water first to neutralise the cleaner before power washing off. Please keep in mind that the cleaning fluid can harm or even kill vegetative cover, so avoid splattering it on your garden or lawn grass. If this is unavoidable, thoroughly rinse with clean water. 4. To achieve perfect results in areas of heavy soiling and extreme, stubborn black/white lichen spots, it may be necessary to extend the dwell time of Essential Patio Perfect to up to 4 hours or overnight where necessary, before power washing clean. Where there are isolated places of black/white lichen spots, apply a second, undiluted coat of Essential Patio Perfect and leave to concentrate for an extended period of time to dissolve the spots before cleaning away as before. 5. If necessary, repeat process; if using the cleaner indoors, proper ventilation during and after use. PLEASE NOTE: The active substance in Essential Patio Perfect is a chlorine-type agent, which will discolour fabrics and sensitive materials. During application, take particular care to avoid contact with fabrics and tarmac. The fluid may cause minor lightening of some surfaces; always test the product in an unnoticeable area before using it.