General description One 5 litre bottle makes 25 litres of product, covering 100-250 m² depending on the surface. Spear & Jackson Spray and Leave is a premium quality formulation designed to remove algae, green mould, and lichen from various surfaces including patios, roofs, fencing, UPVC windows, sheds, caravans, boats, decking, and driveways. The treated area can be used as soon as it has dried, and the product helps prevent re-growth, providing results that last for months. Technical specifications Volume: 5 litres Makes: 25 litres of ready-to-use product Covers: 100-250 m² depending on the surface Other information Box contains: 1 x 5 litre concentrate The colour of the bottle may vary due to availability