Krud Kutter Pro Multi-Purpose Pressure Washer Concentrate is the Pro's choice to make outdoor cleaning jobs easier. The fast-acting, biodegradable and bleach-free formula is the ideal solution for effectively removing grease, grime stains from mold, mildew and algae, oil, fungus and more from a variety of exterior surfaces.Always test on an inconspicuous area first. Rinse surrounding vegetation with water before and after application.