Harbor Safe Marine Care Products
Waxes, Cleaners & Polishes

Marine 31 Mildew Stain Remover Combo

Marine 31 Mildew Stain Remover Combo
Everything you need to remove mildew and prevent it from coming back!

Marine 31 Mildew Stain Remover and Mildew Stain Guard provide a solution to a common problem that plagues all boaters – mold and mildew growth on vinyl surfaces. Marine 31 Mildew Stain Remover effortlessly removes stubborn mildew stains from virtually all surfaces of your boat, including vinyl seat cushions, non-skid, rubber fenders, and more. Marine 31 Mildew Stain Guard forms a durable coating that protects vinyl surfaces, keeping them looking and performing new for years. This money-saving combo includes everything you need to get the most from each product!

If you’re a boater, chances are you’ve dealt with stubborn mildew stains on vinyl cushions, rubber fenders, and non-skid surfaces. 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 and protectants. Fortunately for you, we’ve compared Marine 31 Mildew Stain Remover and Mildew Stain Guard against the best the industry has to offer, and we can say with confidence that our products outperform anything else available.

The Marine 31 Mildew Stain Remover Combo includes:

Marine 31 Mildew Stain Remover Marine 31 Mildew Stain Remover
Marine 31 Mildew Stain 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 Stain 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 Stain Remover.
Marine 31 Mildew Stain Guard Marine 31 Mildew Stain Guard
Marine 31 Mildew Stain Guard is the solution to a common problem that plagues all boaters – mold and mildew stains on vinyl surfaces. This high-tech vinyl sealant forms a clear coating that protects against UV rays, body oils, salt, and most importantly, stubborn stains caused by mold and mildew. Treated surfaces will retain their flexibility while being well protected against the damaging effects of nature..
Natural Tampico Upholstery & Carpet Scrub Brush
This ergonomic brush is made of tampico bristles, which are highly resistant to chemicals and have a perfect texture for scrubbing carpet, upholstery, and fabrics. The sturdy bristles help break up dirt and grime on all materials.
2 Microfiber Towels (16 x 16 inches)
The Microfiber Towel is spun from an 80/20 polyester/polyamide blend, producing a highly refined microfiber. The microscopic polyester/polyamide fibers are split with a unique process that creates a “feathered” weave on one side for buffing and looped fibers on the other side, which are excellent for cleaning. This superior “feather” weave results in far greater absorption properties in a virtually lint free network of fibers.
Indigo Microfiber Applicator Microfiber Applicator Pad
Use the microfiber applicator pad to apply Mildew Stain Guard. This soft microfiber fabric is made of a split weave that is more absorbent than any flat weave microfiber. The inner foam pad maximizes absorption so any product you’re applying goes on streak-free.

Kit includes:
20 oz. Marine 31 Mildew Stain Remover
20 oz. Marine 31 Mildew Stain Guard
Natural Tampico Upholstery & Carpet Scrub Brush
2 Microfiber Towels (16 x 16 inches)
Microfiber Applicator Pad

A total retail value of $75.94. You save $20.95!

Federal regulations prohibit the shipment of this products by air, UPS 3 Day, UPS 2, or US Mail. This item is shipped by UPS Ground only. Sorry but no APO or FPO addresses.

Marine 31 Mildew Stain Remover Combo
Item #: M31-450370
Retail Value:$75.94
Our Price:$54.99 - You Save $20.95 (28%)
Availability: Usually ships the same business day

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Product Reviews

27 Reviews
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100% Recommend this product (27 of 27 responses)
South Carolina
Great product
My boss referred me because this is was he uses at the marina. Followed directions and mold and stains came right off, barely had to scrub. Picture isn't the best but it was taken while spray was sitting.
Mold remover
Tried many products to remove the mold spots from our boat seats. This product worked! Removed it all without much effort on my part! Finally a product that does what it advertises! Will not use any other products again! Will also try other products for our boat made my Marine 31!!
Up North, Minnesota
Works like magic!
Was soooo pleased with results. Our boat seats look like new . Ordered up another galleon to finish up boat.
ConsShoyld have ordered up more to start!
Sarasota, Florida
Mildew remover
Without question. The best Mildew remover I’ve ever used. In over 45 years of boating in Florida, I’ve tried many different products, this is the best. I’m obsessed about keeping my boats clean, and this has made my life easier. Thanks.
Mold is difficult
I had used everything to clean our boat. Your product really cleaned off the built up mold. We have treated the seats with your protector. The boat is been put up for the season but I have expectations not to have the disaster I had in years passed.
Rhode Island
Works great but beware it will bleach clothing
Used product on hot tub cover I couldn’t get mold removed despite scrubbing and even power washing. Product was easy use and completely removed the mold. Cover now looks new.
I had jeans on during the process and a few areas on them were bleached so I would only use this product wearing old clothing.
New York
I ended up with mold on my boat seats this spring. I tried everything to get it off. Nothing worked. I used RMR, wouldn't even touch it. I thought we were going to have to replace the seats. This product literally made the stains disappear. within a minute, with virtually no scrubbing. i could NOT believe my eyes. i also used this on our golf cart seat that had had some mold stains on it. The guy who owned it before us said he fought with those stains for years and could never het them out. Within 30 seconds, they were gone. The seat is white again. This product is amazing. I wish i had taken before and after pictures. thank you!!!
ProsRemoves all mold stains. Absolutely no scubbing on vinyl
ConsNot a one i can think of.
Newport, RI
Removes mildew quickly
Kit had everything needed to remove mildew and then condition the vinyl.
Plenty of product to recondition a 16' ski boat that seats 7.
Best to remove seats if possible to allow a fresh water rinse after application of the mildew remover.
Wear PPE for eye and skin protection. Wear old clothes - product will "bleach" fabrics..
ProsEverything included in kit. Removes mildew well. Using the brush with the mildew remover made work easier. Conditioner (Mildew guard) enhanced the vinyl when done.
Conspricey Mildew guard applicator came apart at seam. Eye and skin protection needed as product is aggressive.
This one works!!
I've tried a few and literally nothing happens. Spray this one on, wait 5 minutes and the mold is gone! My boat looks like new again.
Minneapolis Minnesota
Best mildew beater out there
Works great
Marine 31 Mildew Remover
Amazing product. I’m buying more.
Greenville SC
1994 Ski Nautique
Homestead, Fl.
Wow I couldn’t believe how well this stuff worked! I found out about Marine 31 from you tube and referred this product to everyone I know thank you!
Ocean Springs MS
Excellent product
I have used the mildew remover twice this year and both times it has brought my seats back to new condition. It works so well I have been looking for signs that it's hurting the vinyl, but so far not signs of that at all. It's amazing how well it works. I have just put on the mildew protectant about a month ago so we'll see how well that keeps the mildew off the seats.
ProsAmazed at how well it works on my white seats
ConsNon so far
Bowie Texas
Great product
Mold and mildew wipe right off. Best product I have ever used for heavyly affected vinyl on my boat. Highly recommend the kit for cleaning and guarding against most stains.
Wow... was my reaction after the first section I cleaned! I have tried MANY brands of mildew remover, scrubbed, cried, and even called the upholstery guy for an unaffordable estimate. I found Marine 31 on YouTube and thought "try 1 more time!". And to my absolute delight, IT WORKED brilliantly with minimal scrubbing! The combo purchased had everything needed. Ive now purchased a gallon for future use.... awesome product!
ProsNo bleach. Minimal scrubbing.
ConsFumes were stronger than realized while using.
Love this product!!
I have had a problem with mildew on my boat seats this year for some reason. This product really cleaned my boat great. I live the protector seems like the nicest one Ive used. I will defiantly order from Marine 31 again!
ProsEasy to use, removes mold and mildew
Clemson, South Carolina
Amazing results
First, I am a doubter for all things that claim miracle work. I have lived on and near fresh and salt water all my life, 58 years. I have worked on the water for 35 of those years. Through all those years mold/mildew and their stains were a part of that life. I had tried so many products to try and remove or control the mold and it’s stains. I’ve even tried combining them, some with hazmat results. One day recently I came across Marine 31 on a computer search. Watched many videos and read several articles. All of them claimed results not to be believed. So, I buy the combination package with a doubting mind.
When it arrives I hustle down to the boat expecting similar results from all other cleaning and conditioning products. I read instructions and follow to the letter. I could not believe my eyes. The deep mold and stains were gone, not only that but the boat looked brand new again.
I swear by this product now and stand on my soapbox promoting it to my friends.
Amazing, Amazing, Amazing.
ProsThis product does everything it says.
Works on mold/mildew
This stuff takes out mold/mildew and deep set dirt like magic (we used on golf cart seats). Powerful bleach smell and will definately stain clothing like a bleach product. Works as it says it does. We are ordering now in gallon size. Works on our camper awning and seats (& roof) of golf cart clean. Just rinse after use.
ProsWorks fast.
ConsSmell and stains clothing
Punta Gorda, FL
Works as advertised!
I came across your product on a Youtube video and was a bit skeptical but decided that it might be worth a try. It was! You shipped it to us fast and it worked great on our boat cushions. Made them look good as new. There was still a couple of "deep" spots but overall very pleased. This product will be something I use and repurchase. Thanks
ProsEasy top use! Fast shipping!
ConsLeft a couple of deep spots but nothing serious.
Owensboro Ky
Mildew remover
This product worked awesome. Spray on and mildew just disappears. It’s a little expensive but works great.
My husband tried so many different products that did not work. This is the only product that brought the boat back to being white again. Do not waste your money on other promises. THIS REALLY WORKS!
Stuart, FL
Finally clean!
Over the course of the last 2 years, I have tried a half dozen mildew removal product that claimed to
be the best on the market. I would list them here, but I don't want to embarrass the manufactures.
All were mainstream products, sold everywhere. THEY ALL SUCKED. I happened to come across
a YouTube video of some guy using Marine 31 mildew remover. He kept the camera rolling as the
mildew just disappeared from the upholstery. Well, I already invested almost $200 in trying to resolve the problem, so I
figured what's another $30.
The stuff worked...?€?.just as it did on the video! If you put a brush to it, it works even better. I highly
recommend this Marine 31 product and the sealer for any mildew problem you may have. I'm a happy
boater. End of story!

South Carolina
Great Product
I was very pleased with Marine 31's Mildew Remover Combo. Worked like a charm. Great product.
This product works very well.
This cleaner really works very well to remove mildew from boat seats. You wii definitely want to use in a well ventilated area as it is very strong smelling.
Greenville, South Carolina
Super quick!
Best product for removing mildew!! Spray it on wait a couple minutes & mildew just runs off; wipe it clean. When i finished the the whole boat, i then water sprayed off the floor, which got clean from the run-off from spraying the seats! Then sprayed the mildew guard & buffed to keep it clean. Checked it a week later, still clean & shiny!
ProsEasy, if you follow the directions. Works great with minimal work.
ConsA little expensive. Can't seem to find it, in stock, at any store. Don't bother with the small bottle; get the gallon size, It Is worth it!!
Lake Cumberland KY
It works!
We have had mildew on our pontoon seats for years. We have used many different products with little success. Used the Marine 31 Mildew Remover Saturday morning. You could watch it removing the mildew. The seats are white again. Sprayed it on, rinsed the seats with clean water, let them dry and applied the protection. Very impressed with the products and will recommended them.
ProsIt really removes mold and mildew
Cons1 bottle is not enough for a pontoon boat.