FIGHT DIRTY. Give your boat cleaning blast a boost! Renew + rejuvenate your boat's exterior and decimate scum, oxidation, and algae to safely clean fiberglass, wood, metal, and more with the All-Purpose Boat Wash Pressure Washer Concentrate Formula, from Sun Joe. Specially formulated for use with pressure washers, this concentrated, non-toxic, and completely bleach-free formula can also be applied with a mop or brush to tackle a variety of exterior cleaning tasks. Simply dilute as recommended to achieve the desired cleaning results, then fill your pressure washer detergent tank or soap sprayer attachment, and power up to produce loads of soapy suds to spray away stubborn dirt, grease, gunk, and grime. Now you're ready to fight dirty!