MaryKate Pontoon Cleaner gel hull and bottom cleaner — 32 fl oz, clinging formula for algae, rust and waterline stains

MaryKate CRC Pontoon Cleaner (MK3532) is a 32 fl oz gel-formula hull and bottom cleaner made to remove common boat bottom grime and stains while clinging to vertical surfaces for easier cleaning.

If your pontoon or fiberglass-hulled boat shows streaks, algae, rust marks or other surface discoloration, this gel-based cleaner is formulated to cling to the hull so active ingredients work longer on buildup before rinsing. Packaged in a 32‑fluid‑ounce bottle made in the United States, the product is built for marine use and sized for easy storage aboard or in a garage.

How does this gel formula make hull cleaning easier?

The thicker gel texture helps the cleaner stay on vertical surfaces and recessed areas instead of running off, giving ingredients time to break down stains. That means less scrubbing and more effective contact on oxidized gelcoat, mineral deposits and light biological growth.

• Gel viscosity clings to hull sides and pontoons for sustained contact
• 32 fl oz bottle covers multiple touch-up jobs or a focused cleaning session
• Designed for use on fiberglass and painted surfaces — follow directions for best results

What kinds of stains and buildup will it address?

This cleaner targets common marine surface problems such as waterline rings, rust streaks from metal fittings and general grime that accumulates on bottom and hull areas. It is not a replacement for antifouling paint or professional bottom-stripping—use it for routine maintenance and spot treatment.

• Effective on waterline marks and mineral deposits
• Helps remove light oxidation and surface staining
• Useful for cleaning pontoons, hull sides and transom areas

How should I use MaryKate CRC Pontoon Cleaner safely and effectively?

Always read the label prior to use and test a small, inconspicuous area first. Apply the gel directly to the stained area, allow dwell time as directed, then agitate gently with a non-abrasive pad before rinsing thoroughly.

• Test a small hidden area to confirm compatibility
• Apply gel, wait recommended dwell time, scrub lightly, then rinse
• Use protective gloves and eyewear; avoid contact with unprotected metal hardware

Will this product harm paint, metal or underwater gear?

When used according to instructions, it is formulated for hull and bottom surfaces typical to recreational boats; however, prolonged contact with certain metals or uncoated fittings can cause spotting. Rinse exposed hardware and delicate components promptly and avoid prolonged exposure to rubber or non‑recommended materials.

• Rinse hardware and fittings after treatment to prevent spotting
• Avoid use on untested materials without a preliminary patch test
• Not intended as a substitute for antifouling or professional restoration

Who this is for: Boat owners, marina technicians and weekend boaters who need a reliable spot treatment for hulls and pontoons will find this MaryKate 32 fl oz gel cleaner useful. It’s best suited to routine maintenance, post‑season cleanup and owners who prefer a product that clings to vertical surfaces for improved stain removal. For large scale bottom work or heavy marine growth, combine with professional services or specialty antifouling treatments as needed.