Brush or spray on, allow 5 to 10 minutes in ambient temperature, then rinse it off.
For use on fiberglass only
Easy to use and works instantly.
This is a buffered acid cleaner.
Formulated to ease End-of-the-season haul out cleaning
Removes waterline stains, algae stains, rust and gas exhaust stains
Excellent for great lake applications and barnacles.