This professional grade cleaner has been designed to remove calcium deposits, algae and soften and help remove barnacles from all boat and yacht propellers. It delivers superb propeller cleaning results on a range of metals including stainless steel, bronze and aluminium propeller blades, shafts and casings. It is easy, efficient and quick to use with an acidic formulation that doesnt release pungent gases or fumes. It will leave your propeller clean and shiny without the need for serious elbow grease Superb results are easily achieved by simplybrushing onto surface and washing off after 5 10 minutes. Instruction for use Remove any grease or hydraulic oil from area to becleaned. Place required amount of Propeller Cleaner into acontainer suitable for dipping a brush. Brush Propeller Cleaner over propeller blades, shafts andcasings with a standard paint brush. Agitate if required orleave to soak for 5 10 minutes. Barnacles will soften andcan then be removed with a brush/wire brush if necessary. Wash propeller with fresh water to remove all productresidue. Once dried, blades can be finished with a suitablegrade polish or antifoul