Advanced Cleaning for Your Boat's Hull Hammerhead Hull Cleaner is formulated with a unique acid-surfactant blend designed to tackle tough marine growth, hard water stains, rust, and calcium buildup. Unlike traditional hull cleaners, Hammerhead is free from harsh acids like muriatic, sulfuric, and phosphoric acid. Instead, it uses renewable resources to deliver powerful cleaning while rejuvenating surfaces back to their original appearance. Safe for All Surfaces This non-corrosive cleaner is safe to use on virtually every surface, including fiberglass, aluminum, chrome, rubber, and glass. It effectively removes hard water stains and scale without damaging your boat's finish, leaving surfaces looking like new. Whether it's fiberglass or aluminum hulls, Hammerhead Hull Cleaner gets the job done without dulling or harming the surface. Easy to Use Cleaning your boat's hull is easier than ever. Simply spray Hammerhead Hull Cleaner onto the surface, wait 20 minutes, rewet, and then brush or wipe clean. For added convenience, if you don't have time to clean right away, let it dry and the hull will still be ready to clean when you rewet it later. The cleaner removes buildup while preserving your boat's Gelcoat or aluminum finish. Versatile Formula Hammerhead Hull Cleaner isn't just for hulls. Use it to remove hard water stains from windows and other surfaces. Its mild degreasing action makes it perfect for eliminating perspiration, suntan lotions, grease, and oils found throughout your boat. No other hull cleaner offers the same level of safety and flexibility.