Barnacle Blaster RTU Ready To Use - 32oz Features: * Removes deposits on boat bottoms, scum line and rust stains quickly and easily * Special ingredients to quickly remove barnacles and clean rust, oil stains and algae * You've never seen anything like this! Barnacles literally begin to fall off the hull of the boat! * Requires very little scrubbing * Will not harm fiberglass or gel coat * Can safely be recirculated through sea water cooling systems, dissolving barnacles, zebra mussels, calcium, rust, lime and all other mineral deposits * Water based, environmentally friendly formula * Special buffering process makes this product safer than other acid-based bottom cleaners