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Harbor Safe Marine Care Products
Waxes, Cleaners & Polishes

Marine 31 Mildew Remover Gallon & 20 oz. Combo

Marine 31 Mildew Remover Gallon & 20 oz. Combo
Money-saving combo includes gallon plus a full 20 oz. bottle!

Marine 31 Mildew Remover quickly and safely removes stubborn mildew stains on virtually all marine surfaces, including vinyl seat cushions, rubber fenders, fiberglass, gel coat, canopies, and more! Marine 31 Mildew Remover forgoes volatile cleaners and instead relies on smart chemistry; even severe mildew growth is no match for the incredible cleaning power of Marine 31 Mildew Remover.

Marine 31 Mildew Remover is the best boat mildew cleaner available!If you’re a boater, chances are you’ve dealt with stubborn mildew stains on vinyl cushions. If you’re reading this product description, chances are you’ve been less than satisfied with the performance of other so-called marine mildew cleaners. Fortunately for you, we’ve compared Marine 31 Mildew Remover against other marine mildew cleaners and have found that it removes mildew stains faster, with less effort.

Not all marine mildew removes are created equal! Most over-the-counter marine mildew cleaners rely on heavy concentrations of bleach and other volatile chemicals that actually cause more harm than good. Marine 31 Mildew Remover removes stubborn mildew stains without discoloring, dulling, or drying out vinyl surfaces. Best of all, it still retains the powerful cleaning ability to remove mildew stains – FAST!

Use Marine 31 Mildew Remover on:
  • Vinyl cushions and chairs
  • Rubber fenders
  • Fiberglass
  • Gel coat
  • Canopies
  • Boat tops
Marine 31 Mildew Remover works wonders for household cleaning as well! Use this professional strength formula to clean tile, grout, showers, bathtubs, counters, and sinks.

Marine 31 Mildew Remover works FAST!Directions:
  1. Spray directly onto surface and allow 1-3 minutes for penetration.
  2. If necessary, agitate surface with a brush or terrycloth towel.
  3. For stubborn stains, allow cleaner to penetrate for 5 minutes before agitating.
  4. Thoroughly rinse and dry surface.
  5. Follow with Marine 31 Mildew Guard to protect treated surfaces.
Includes 128 oz. and 20 oz. bottle with sprayer.

Made in USA

Marine 31 products are harbor safe and eco friendly!

Marine 31 Mildew Remover Gallon & 20 oz. Combo
Item #: M31-372-COMBO
Our Price: $67.99
Sale price: $57.99 - You Save $10.00 (15%)
Availability: Usually ships the same business day

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Product Reviews

8 Reviews
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100% Recommend this product (8 of 8 responses)
Awesome product Does am amazing job Can say enough The videos you see are true!!!

I am a boat dealer and we see horrible mold and mildew conditions ...My own chriopractor
tried it on his father inlaws boat THE WHOLE BOAT was covered and It worked ..They surprised him When they brought him to the dock He didnt think it was his boat !!!
Prosworks fast and does a beautiful job..
ConsSmells strong but that dissapates after a bit... So worth this little annoyance...
Baltimore, Maryland
Works great
This is powerful stuf. Make sure you use it in a well ventilated area. After spraying it on, the mildew just seemed to disappear. No scrubbing was required. I used it on my boat seats and on the inside of my portable garage cover. Worked great.
ProsEasy to use. No scrubbing required. A little goes a long way.
Wareham MA
This product WORKS!,,,,,,
I’ve tried every mildew product out there with disappointing results. I happened to see this being used from another customer on Facebook so I decided to give it a try, IT WORKS.
ConsA easier to pour container would be nice.
Toms River, NJ
Mildew remover
Finally found a product that works. I have been trying to remove the mildew on the top of my vinyl boat seats for years with different products.
Marine 31 did the impossible and now I have my white seats back again.
ProsEasy to use.
ConsMy only concern is Marine 31 mildew remover smell like chlorine. I know chorine products over time will destroy the stitching. I don't know if there is chlorine in the product or not
Tallahassee, FL
Way better than its competitor!
The boat shop where I bought my boat gave me a free bottle of Starbrite but it didn't work very well. Went online to look up a better product and watched videos comparing Starbrite and Marine 31so I order the M31 and got the same results as in the video. Do yourself a favor and buy some M31, it really makes a huge difference.
victoria, bc
Great stuff but....
The good stuff: I used this stuff after trying so many other products without success. It did a great job removing stains and mildew from my seats. I followed the directions and as soon as I was done cleaning I wiped the seats down with a clean wet rag afterwards

The bad stuff: I left the rag I used with this stuff in a bowl for 2 days thinking I would go back on an area that was tough to remove the stains (this stuff removed about 95%). The rag had basically disintegrated into mulch. Now that made me wonder how the product reacted with my vinyl seat stitching. The product says its non acid based formula, but it makes me wonder. What ever you do get this stuff washed off your vinyl as quickly as you can
Florence, SC
Marine 31 is awesome!
Best cleaner I have ever used on fiberglass boats!
ConsLittle pricey!
105 Oak Valley Road, McDonough GA 30253
boat seats
works great!!