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ALGEX® aluminum boat bottom cleaner is the world's 1st aluminum boat cleaner especially invented for safely cleaning pontoons and aluminum boats. Use ALGEX® to clean aluminum boats, aluminum pontoons, Outdrives, Sterndrives and Propellers. ALGEX® will remove Algae, Barnacles and Zebra Mussels on your aluminum boat, but it will not Pit Aluminum or Strip Paint.

How to clean your aluminum boat? It is very easy with ALGEX®.

  • Spray on the surface it needs to be cleaned
  • Brush and Rinse Away Algae, Barnacles and Zebra Mussels.

It is that easy!


Aluminum Boat Cleaner Specialized in Cleaning Boat Bottoms

ALGEX® Cleans & Removes Algae, Barnacle & Zebra Mussels from aluminum boats. You can use ALGEX® to Clean Aluminum Pontoon Boats, Outdrives, Sterndrives, Props and Brass Rails. There is No-Fume Formula in a Ready-To-Use Spray Bottle. Our Aluminum Boat Bottom Cleaner is Fast and Easy to Use - Spray On, Brush and Rinse Marine Growth Away. It is Safe for Cleaning Sterndrives and Outboards. It will not Pit Aluminum or Strip Paint. ALGEX® will remove Rust and Oxidation. Satisfaction Guaranteed!

Where to use ALGEX®

ALGEX® is the best aluminum boat cleaner for removing algae and other marine growth. It's safe for aluminum boat bottom cleaning, aluminum pontoon cleaning, aluminum outboard and sterndrive cleaning, aluminum and stainless steel propeller cleaning and won't turn the aluminum or stainless black or cause pin holes like other acid cleaners.

EASY TO USE Boat Bottom Cleaner:

Spray Directly Onto Algae and Power Wash or Brush & Rinse Clean!

Before Cleaning With ALGEX®
After Cleaning With ALGEX®

How ALGEX® Works:

ALGEX® works by quickly penetrating and breaking the bond between the algae and the aluminum so it can be easily and completely removed by pressure washing or scrubbing and rinsing with a garden hose. It also softens Barnacle, Zebra and Quagga Mussel shells and adhesive to make removal by scraping easier.

Other Places ALGEX® Can Be Used:

ALGEX® can also be used for cleaning and brightening galvanized trailers and for removing hard water spots from fiberglass boats. ALGEX® is an aluminum boat cleaner invented for removing marine growth and is not a brightener such as ALUMABRITE®. It does not protect against marine fouling. For that you require VS721® BOTTOM COAT.


Won't darken aluminum Or stainless steel or cause pin holes. Won't damage Aluminum Casings or Remove Paint. Recommended for Removing Algae and softening Barnacles & Zebra Mussels for easy scraping aluminum boat bottoms, aluminum pontoons, Outboards, Sterndrives and propellers.

removes algae from boats clean bottom of boat clean aluminum boats

This aluminum boat cleaner is a unique aluminum boat cleaner or pontoon cleaner for boat bottom cleaning. For more information on how to clean an aluminum boat, cleaning pontoons and boat bottom cleaning, visit the Ask the Skipper Blog Aluminum and Pontoon Boats: Cleaning and Protecting.

Why You'll Love It!
  • Won't darken aluminum Or stainless steel or cause pin holes.
  • Won't damage Aluminum Casings or Remove Paint.
  • Recommended for Removing Algae and softening Barnacles & Zebra Mussels for easy scraping aluminum boat bottoms, aluminum pontoons, Outboards, Sterndrives and propellers.

VS721® FOULING RELEASE KIT contains Aurora Marine products for easier    Read More


BOAT CLEAN PLUS® is a Free Rinsing, Deep Penetrating, Concentrated, Water Base   Read More


ALUMETRON® Fights Corrosion, Protects Aluminum up to 10 YEARS   Read More


Clear, Fouling Release Coat for Fiberglass, Aluminum and Pontoon Boats, that is an Environment Safe Alterna   Read More

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Frequently Asked Questions

  • Algex & Alumabrite can both be applied between 35"F - 2"C and 80"F - 27"C. The lower the temperature, the slower the cleaning and brightening will be and the longer you will have to wait. The higher the temperature the faster the action but when the temperature is at the higher range, you also have to be careful that the products do not evaporate before they have had a chance to work.

    When working with Algex, it's helpful to cover the area with plastic to prevent evaporation and allow the chemical to work long enough to remove the growth. When working with Alumabrite, it's important to do a test in an inconspicuous spot to determine the right concentration and amount of time to leave the product on. If it starts to dry before you rinse it off, you will get streaks. If left on too long, especially in elevated temperatures, it will turn the aluminum white.

    When you are through cleaning your aluminum, consider protecting it with Alumetron. This clear coating is easy to apply, very durable and will keep your aluminum looking clean and shiny for years. It's not an anti-fouling. To reduce the attachment of marine growth you need VS721.

  • Algex normally does not affect factory applied paint if it's powder coated or baked on. It's always wise to test it on an inconspicuous spot first to make sure. The other thing is not to leave the Algex on longer than is necessary to remove the growth.

    Keep in mind that in some cases the marine growth will penetrate through the paint and you may find pitting of the aluminum and damage to the paint. In future I suggest protecting the painted surface with VS721. It will reduce attachment and make cleanup much easier.

  • If your pontoons are 25" in diameter then the total surface area of both pontoons is about 321 sq. ft. I assume that 1/2 or less of the pontoon is in the water, therefore the wetted surface that you need to deal with is about 160 sq. ft. If you are like most pontoon boat owners you are only concerned with the outside of the pontoons, plus a bit on the inside at the front and back where they are visible co you can calculate about 1/2 the surface area plus about 20% for the front and back or about 192 sq. ft.

    The amount of Algex that you require will depend on the amount, type and age of the growth. If the growth is light then one bottle will do, if moderate two bottles. If the growth is have (grass hanging off) then probably 4 bottles as you may have to go over them twice. If you have zebra mussels then you may need 6 bottles. In the last case, you will have to spray it on the mussels and let it sit for 30 to 45 minutes to soften them up. Then scrape them with a plastic or wooden scraper. Afterwards, you will have to spray the adhesive from their attachment pods to soften and dissolve those and scrape again.

  • Yes, you can safely use Algex on fiberglass but it is not as aggressive as Algae Strip Industrial or Green Genie and may take several applications with 30 to 40 minute wait times for the chemical to work to get the same results. Use Algex on your props, trim tabs, lower drive unit and other underwater metal. It will clean the marine growth without damaging or discoloring the metal.

  • The amount of Algex you require is dependant on the amount and type of growth that you have on the bottom. One bottle will normally clean average growth from a 20 to 22 ft pontoon boat. Heavy growth or barnacle attachment can require multiple coats and therefore more product. If your pontoons are stained, use Alumabrite to brighten and restore them. VS721 Bottom Coat will help prevent future attachment of marine growth.

  • The simple answer is yes, Algex will work and it’s safe for bellows and seals. How well it meets your expectations however, depends on the extent of the growth. If you are interested in learning more click HERE

For More Information
For More Information Ask The Skipper





ALGAE: Remove loose growth with scrub brush or power washer. Spray Foam onto Algae, making sure that the surface is drenched. Do not spray onto bare aluminum. Allow to work until algae releases easily from the aluminum. Power wash or brush & rinse clean. Repeat if necessary. Do not allow ALGEX® to dry before rinsing.

BARNACLES & MUSSELS: Remove Algae as above. Spray Foam onto Barnacles & Mussels and allow to work 30 to 60 minutes. ALGEX® will soften shells to make scraping easier. Scrape off with wooden or plastic scraper. Spray Foam onto adhesive & rings. Allow to work 30 to 60 minutes. Scrape away residue. Rinse clean. Repeat if necessary. Do not spray ALGEX® onto bare aluminum.

CALCIUM: Not suitable for calcium deposit removal.

If aluminum is stained or oxidized, clean & brighten with ALUMABRITE CBX®. Remove streaks and white cloud with ALUMABUFF® to maintain shiny finish. If pontoons are etched or streaked buff with ALUMABUFF®. Protect with ALUMETRON®. To reduce fouling attachment and make future clean up easier, apply VS721® over ALUMETRON®.


CAUTION: CAUSES BURNS. Do not swallow. Do not get in eyes & on skin or clothing. Do not breathe fumes. Handle with care. Keep out of reach of children. Wear protective gloves/clothing and eye/face protection when mixing or using. Use only in a well-ventilated area.


FIRST AID: Contain Sulphamidic acid (1%-5%), If medical advice is needed, have product container or label at hand. If swallowed, call a Poison Control Centre or doctor immediately. Do not induce vomiting. If in eyes or on skin, rinse cautiously with water for several minutes. Seek medical advice if discomfort or irritation persists. If breathed in, move person into fresh air.

Aurora Marine Shipping Policy

We Ship to 48 contiguous US States & Canada (Out areas call for Quote. Please note we do not ship to PO Boxes.) for a flat rate of only $10.95 delivered to your door.

Get FREE Shipping When you Order $100 or More.

For International Shipping, please call for a quote.

Aurora Algex®

    • Catalog No: 11150
    • Individual Unit: 600 ml
    • Shipping Weight: 1.98 lb
    • Case Volume: 12 X 600 ml
    • Case Weight: 23.8 lb (10.8 kg)
    • Case Dimensions: 8.3"L x 13.3"W x 10.3"H

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