Marykate MK2032 On and Off Hull & Bottom Cleaner - Quart

Marykate On and Off Hull/Bottom Cleaner (MK2032) is a fast-acting, acid-based cleaner specifically formulated to remove waterline stains, rust, algae, barnacle shadows, and mineral deposits from boat hulls and underwater surfaces. It is a trusted staple in marine maintenance, widely used by boaters to quickly restore the appearance of fiberglass, aluminum, and painted hull surfaces.

Key Features:

• Rapidly dissolves tough waterline stains, rust streaks, and algae deposits
• Effective on fiberglass, aluminum, and painted boat hull surfaces
• Removes barnacle shadows and mineral/lime scale buildup
• Biodegradable formula — safe for use around the water when used as directed
• No scrubbing required for most stains — spray on, rinse off
• Quart (32 oz) size — ideal for routine maintenance and spot treatments

Simply apply Marykate On and Off directly to the hull surface, allow it to work for a few minutes, and rinse clean with water. For best results, use on a wet hull and avoid allowing the product to dry on the surface. Always follow label directions and wear appropriate protective gear when handling.