Measurements: Each bottle is 5 Litres with a trigger hose. This strong formula is designed for use on patios, roofs, fencing, upvc windows, sheds, caravans, boats, decking and driveways. Helps prevent re-growth see results that last for months. Our remover has been specially formulated to aid in the removal of green growth from paving. Whether you have concrete block paving, concrete slabs/flags, natural stone paving, porcelain paving or tarmacadam, our algae, mould and lichen remover utilises strong dissolving formula technology, which ensures there is no need to scrub, rinse or pressure wash the area following application. You can also apply it straight from the bottle.