This Pro-Kleen Patio Cleaner is free from any nasty chemicals. This means that you can be sure you can clean your path or patio without worrying about any damage towards you or the planet! Our formula is extremely versatile. It can be used to deeply clean patio flags, decking, tarmac, glass, plastic, slate, felt roofs and walls - whether they are painted or not! Please note: this product can be used to clean birdbaths and ornamental water features. To get your driveway or patio clean as quickly as possible, this formula is super quick and easy to use. There's no need to rinse the solution off - simply apply the product onto the dirty area using a garden sprayer or a soft broom or paintbrush. Once applied, simply walk away and watch the space start to become cleaner and brighter over the next few days! 5L makes 20L 5L per 30 square metres 120 square metres total coverage per 5L bottle ProKleen Chemical Free Path & Patio Cleaner Concentrate Fluid 4 x 5L in Clear