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Marine 31 Mildew Stain Remover 20 oz.

Marine 31 Mildew Stain Remover 20 oz.
Remove stubborn mildew stains – FAST!

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 the most severe mildew stains are no match for the incredible cleaning power of Marine 31 Mildew Stain Remover.

Marine 31 Mildew Stain Remover is the best boat mildew stain cleaner available!If you’re a boater, chances are you’ve dealt with the seemingly lasting results of 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 stain cleaners. Fortunately for you, we’ve compared Marine 31 Mildew Stain Remover against other mildew stain cleaners and have found that it removes mildew stains faster, with less effort.

Not all marine mildew stain removers are created equal! Most over-the-counter marine mildew stain cleaners rely on heavy concentrations of bleach and other volatile chemicals that actually cause more harm than good. But Marine 31 Mildew Stain 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 and in the convenience of a spray bottle. To use, spray and allow to dwell for up to three minutes before thoroughly washing away. You can use a brush or microfiber towel to agitate the surface. Once done you can say goodbye to the mildew stains! You can safely use Marine 31 Mildew Stain Remover on vinyl cushions and chairs, rubber fenders, fiberglass, canopies and boat tops. But don't forget, Marine 31 Mildew Stain Remover can also be used inside the home as well! Use it to clean and remove mildew stains from tile, grout, showers and bathtubs, counters and sinks.

Use Marine 31 Mildew Stain Remover on:
  • Vinyl cushions and chairs
  • Rubber fenders
  • Fiberglass
  • Gel coat
  • Canopies
  • Boat tops
Marine 31 Mildew Stain 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 Stain 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 Stain Guard to protect treated surfaces.
20 oz.

Made in USA

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 20 oz.
Item #: M31-370
Our Price: $21.99, 4/$65.97
Availability: Usually ships the same business day

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Product Reviews

186 Reviews
87% (161)
4% (7)
2% (4)
4% (7)
4% (7)
89% Recommend this product (166 of 186 responses)
Pittsburgh, PA
Magic in a bottle
We pulled our boat out of storage last week and all the vinyl was covered in mold and mildew. After 2 hours of scrubbing with mold and mildew remover and then trying a magic eraser - I was very upset thinking we would have to have the cushions recovered. The mildew had stained all the cushions and I couldn't get them to come off. I found this product online and figured I would try it before searching for someone to recover our seats. This stuff is MAGIC! I didn't even have to scrub the spots. It took awhile for the stains to disappear - but after about 15 minutes - every single spot was GONE! I will buy this product every year - and I am going to try the mildew preventer before we put the boat away at the end of the summer. HIGHLY recommend this product!!
Lillington NC
Marine 31 Mildew Remover
Absolute wonderful product. For health reason, boat sat for two years in North Carolina's humid, moist weather. Was covered with canvas boat cover for 1 year. Last year sat out in elements uncovered. In effort to clean, I researched internet and decided to test four methods of removing mildew: 1) Marine 31; 2) 3M mildew remover; 3) comet spray gel (vinyl only); and 4) magic eraser. Applied all 4 products to boat platform, left for 5 to 10 minutes. Marine 31 results were unbelievable. Person that was helping me could not believe the difference in the results as compared to the others. Family and Friends that have visited, I take them out to see the boat. Also boat owners, they understand the effort and frustration in trying to removed mildew/mold. Needless to say, they have ordered the Marine 31 to clean their pontoon. The mildew//mold on platform was heavier, darker, and thicker than what is shown in the cushion pictures below. It was just the only items I didn't get cleaned before I ran out of Marine 31 and have reordered. A picture is included to show how great the platform looks now. Like New. It was only when I was reordering to complete the project (cushions shown) that I decided I had to write the review. So wish I had a before and after on platform. Writing reviews is out of character for me, BUT I had to let others know. I have invested too much time in previously cleaning our boat and by no mean got the results obtain with Marine 31. The Marine 31 actually removed the gray spots left from previous cleanings where mildew stain could not be removed. The boat is a Renken (oldie but goodie) with lots of wonderful memories. My excitement from using the Marine 31 Mildew Remover has given me such confidence in this Brand that I will be ordering their oxidation products.
ProsQuick, efficient, and does the job. Spray on, leave 5 to 10 minutes, wipe off Cleans much older (gray) mildew stains that were left when previously clean the boat (3 years ago)
Be careful
This product really cuts through but should be spor tested first. I have spotted seats I can't seem to get even. Follow instructions and rinse the cleaned area generously with water and then dry.
NC Outer Banks
Totally Skeptical until I used it
2007 Everglades with mildew embedded in many of the soft vinyl cushions and hard plastic trim. Tried Starbrite products, even Clorox Cleanup, none of which worked on mildew that was there for years. Used the Gel spray and lightly scrubbed with brush provided. Vinyl and plastic trim completely cleaned. Could not believe it!! Haven’t tried the Guard product yet but the Remover yields unexpected results!!
ProsEasy to apply; quick results
Floral City, Florida
Marine 31
Works great, really cleans boat seats easily. Highly recommend...
So. Cal
It works great.
I was recommended this product in a boating forum so I gave it a try. It works great on removing mildew from my boats vinyl where other cleaners could not.
huntingdon, Pa.
this is the most wonderful cleaner i have ever seen... just spray it on, wait a few minutes, wipe it away! old mold and mildew disappear!
Prosfast and efficient very easy to use!
Eastham, MA
Been trying to clean the vinyl on the boat for years. Was ready to use vinyl paint when I came across your product. What a fantastic job it did. I’ll be ordering the gel to handle the vertical surfaces but it has saved me hours of effort. Thanks for such a great product
ProsSpray on and let it sit. Eliminates mildew with no effort.
Madison Mississippi
Worked great removing mildew from seats.
Great job cleaning!!!
Myrtle Beach
works unbelievably
I wish everything we bought did what is is supposed to....
ConsI took special precaution with being sure it didnt get on my boat carpet but other than that amazing
After trying numerous products we were so happy to find marine 31.
We have been fighting mildew spots on our boat for a year.
I did exactly what it said you spray it on wait 5 minutes and wipe off.
Absolutely amazing to watch it melt in front of your eyes.
ProsI tried to show pictures that it would not let me
Tampa Fl.
disappointed and did not work
did not eliminate the mildew on the seats a described
Long Lake , NY
Marine 31 Mildew Remover
I wish I had taken a picture of the mildew on the seats in my boat to show how bad the back seats were . I followed the instructions and now the seats look great ! I just reordered more !
ProsI works as other products I used did not work !
Minneapolis Mn
Excellent Results
My 2006 pontoon had several mold/mildew spots on the vinyl seats. I tried a solution I saw on a youtube video using CLR mold and mildew remover and Mr.Clean Magic Eraser which did not work for me. I purchased Marine 31 and the seats cleaned within five minutes. I also cleaned several cup holders and they restored back to the original bright white color. I recommend this product.
ProsWorked really well. No scrubbing with a sponge or soft brush was needed in my application.
Knoxville Tennessee
second time buyer
I have had great success with Mildew Remover. As a matter of fact. I recently towed a 2009 Pontoon boat which stays covered and on a lift and the owner complemented me on how good my 1992 Bryant run a bout looked. I also sprayed it on the ceiling in a bathroom at home that was showing black spots and it removed them.
Mohican Lake, Glen Spey NY
Finally a product that works!
I am in awe! The seats on my pontoon boat were badly mildew stained. I started spraying going down one the time I went back to the beginning of my work all I had to do was lightly wipe off. The seats looked absolutely brilliant! Simply amazing! Highly recommended!
South Louisiana
Saw a review on YouTube
I have tried them all. This product works. Spray on and wait a few minutes.
Outstanding product
This is the ONLY product that took mildew off my boat cushions.
ProsIt?s a little expensive
Woodbridge nj
Works great removed all mildew plus highly recommended
No Joke! It works!
We bought this product after seeing videos online of success. We were skeptical that we would have the same results but we were surprised! It worked just like the videos! We showed my in-laws and they immediately wanted to get some for their RV. That got me thinking about our RV so I ordered the gallon!
ProsWorks perfect! Spray it on, wait a few min, lightly agitate for stubborn spots, then rinse
ConsIt will take color out of your clothes. No big deal. Just wear old clothes and be careful.
Mineral VA
The Best
This product has cleaned a number of areas in and around my boat that turned black from mold.
I has safely cleaned the vinyl seats and the cloth like fabric on the ceiling of the head room. Even on our dock's bumpers where it would not completely clean off with a power washer.
Rhode Island
Mildew removed!!
Didn’t think it would help much but it made my boat cushions look new!!
, Dadeville AL
Works great!
Easily removed the mildew from my pontoon seats.
Paynesville, MN
High Expectations
In light of the $21.99 cost of Marine 31 and another $10.00 shipping I was skeptical to say the least of how this product would preform. I tested it on some lawn furniture before cleaning my boat. It blew me away how well it worked and it was safe enough for my 14 year old granddaughter to use it. The directions said for stubborn stains to let stand for 5 minutes but by 3 minutes the product was drying and we had to scrub so the really deep stains were 90% removed. That said I will purchase this product again.
ProsIt?s safe and easy to use.
ConsThe cost per ounce is high.
Its a life saver!
Works so fast and doesn't seem to hurt the fabric if you follow the directions.
Hartford, WI
Removes molding from old boat!
We have a 17 year old pontoon with white seats, which have developed mold on them over the years. Even a first pass on the seats with this spray, the stains either came out completely or faded the green/gray stains drastically (depending on the severity of the stain). Will definitely be buying this product again for touch ups!! A great way to refresh the look of your seats.
Great stuff!!
Great for cleaning mildew on boat.
loved it!
used on a coleman saluspa portable hot tube.Nothing worked,tried everything.Went on utube
and someone in florida bought a boat needed tlc?€?.he used marine 31,and it looked brand I purchased marine amazing,and also on a pelagan kayak cleaned up in seconds!
Dadeville, AL
Awesome Mildew Remover
Awesome stain remover. Just spray wait a second and with a damp cloth boat seats come clean!
Fairfield Bay, AR
Saved Several Hundred Dollars
I think I may have already reviewed the product, but it is FANTASTIC! It saved me several hundred dollars in upholstery costs. I bought a vintage pontoon boat that had 30+ years of mildew spots on the furniture. We were in the process of obtaining an estimate to recover the the furniture including two pedestal chairs and the captain's chair. After using Marine 31 Mildew Remover, we no longer need those chairs recovered. I have never seen any cleanser work like this, and I've now ordered a gallon for future use. Worth every penny.
ProsFast service Excellent product
ConsWear good rubber gloves, or your hands will smell like bleach for days.