When its time to pull that boat out of storage and hit the water, or just restore your investment to its former glory, no boat-hull cleaner works better than Bass Pro Shops Heavy-Duty Hull Cleaner Gel Formula. This proven cleaner removes waterline stains on contact with a gel formula that allows maximum stain-cleaning power. Use Bass Pro Shops Heavy-Duty Hull Cleaner Gel Formula on fiberglass or painted surfaces. Removes stains from the waterline, rust, and even leaves, in fewer strokes than more expensive cleaners. Youll love it. Imported. Size:22-oz. Spray Bottle. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Size: 22 OZ. Color: Rust. Type: Cleaning & Protectant.