Harbor Safe Marine Care Products
Waxes, Cleaners & Polishes

Marine 31 Mildew Remover Gel

Marine 31 Mildew Remover Gel
Clings as it cleans!

Marine 31 Mildew Remover Gel has a higher viscosity than the standard formula. This means that Marine 31 Mildew Remover Gel won’t be pulled off the surface by gravity as quickly, giving it more surface time to do its business! As with any cleaning product, the longer Marine 31 Mildew Remover Gel is on the surface, the more thorough the cleaning!

Marine 31 Mildew Remover Gel 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 Gel 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 Gel.

Marine 31 Mildew Remover Gel 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 Gel 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 Gel 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 Gel on:
Vinyl cushions and chairs
Rubber fenders Fiberglass
Gel coat
Boat tops

Marine 31 Mildew Remover Gel 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 Gel works FAST!

Spray directly onto surface and allow 1-3 minutes for penetration.
If necessary, agitate surface with a brush or terrycloth towel.
For stubborn stains, allow cleaner to penetrate for 5 minutes before agitating.
Thoroughly rinse and dry surface.
Follow with Marine 31 Mildew Guard to protect treated surfaces.

20 oz.

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 Remover Gel
Item #: M31-375
Our Price: $23.99, 4/$71.97
Availability: Usually ships the same business day

Product Reviews

Review Summary
8 Reviews
88% (7)
13% (1)
0% (0)
0% (0)
0% (0)
88% Recommend this product (7 of 8 responses)
Amazing stuff
I have an inflatable boat that had lots of dirt and mold. This product basically melted away the mold and dirt. Spray it on and walk away for just a few minutes and the mildew is literally dripping off the boat. A couple of reasons why I did not give it 5 stars - and only because I had to learn these things and will know better next time I use it:
1. I sprayed on using the sprayer and like I said, the mold "dripped" down the sides. This legt some areas between the drips that were still "dirty". I learned after a while that I really need to spread the gel over the surface to completely cover the area.

2. In "spreading" the gel over the entire surface, I was stupid and used an ungloved hand (the directions do say to use gloves). After working this way for 30 minutes, the outer layer of skin on my fingers was burned off and started bleeding. It healed in a couple of days with no permanent damage or scarring, but it did scare me. Lesson learned - use gloves if you intend to actually put this stuff on your hands or just spray it and whipe with towel.
ProsMiraculously dissolves mildew as you watch the mold melt away
ConsWill burn skin, so use gloves if you intend to actually use your hands to spread the product. It is NOT a problem if a little gets on you and only became an issue when I got a lot of it on my hands
Top notch mold/mildew remover
Having tried every conventional mold/mildew remover I knew of ( Bar Keepers Friend, Star Brite, Magic Eraser, Comet, Bleach Solution) and a maryid array of other suggested cleaners with little to no success.
I decided to give Marine 31 a go, before I replaced the mold stained vinyl in my boat.

I applied the mold remover, waited 3 minutes and washed it off. To say that I was dumbfounded at how clean the cushions was, is an understatement.
This product saved me thousands in vinyl replacement.

Marine 31, you have me as a life long customer.

Thank you.
ProsQuickly and effectively cleans vinyl.
ConsWill stain/discolor clothing if not careful.
Newark, OH
Amazing product
Sprayed the Mildew Remover Gel on a white vinyl top of a 41 year old Lincoln. Waited 5 minutes and the mildew just disappeared. Several other products that I tried would not touch the mildew, even with a scrub brush.
South Texas
Marine 31 Mildew Remover Gel
Item did arrive on time as described, haven’t used item yet
Ocean Springs MS
Saved $5k in new seats
I've been using this product for a few years where my boat stays out in the dock all year long in the very wet south. If it wasn't for this product I would have spent $5k on new seats for my boat. I use this a couple of times a year along with the mildew guard and my seats look new. Great stuff!
St Petersburg, FL
Worked like a charm
This worked great on removing stubborn tiny mildew specks that were appearing on our new boat's upholstery. This will definitely be part of our regular maintenance!
Chippewa bay, ny
Great product
Removed mildew on my boat seats I had been trying to remove with other products in a matter of a few min. Exactly as advertised.
ProsWorks like it should
Amazing results
The seats in our boat are badly mildewed and we have tried numerous things to clean them. This stuff worked like magic. I will say that one bottle isn't enough to do an entire boat, as it's a gel and goes on thick. I ended up ordering a gallon after using the first bottle. It's worth every penny.
ProsSpray on and rinse off. Amazing results.
ConsIt's thick and you will need more than one bottle but it's worth it.