Spear & Jackson Spray & Leave is a premium quality formulation that will keep on working for many months due to its strong cleaning power, results will be visible in a few days and will keep improving over time. Spray and Leave is a super powerful outdoor green mould and algae removing solution – the intense cleaning fluid revives your patio, decking, fencing, outdoor furniture, and so much more and is safe for children and pets once dry! Just wet & forget about it. This power sprayer is simple and easy to use, with a translucent graduated bottle displaying litres and fluid ounces for accuracy when filling, or mixing water/stone cleaner/fungicidal wash within the bottle. SJ garden pressure sprayers are built with your safety in mind. This portable washer has a shoulder strap for support and safety.