Marine 31 Mildew Stain Remover
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.
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 Remover on:
Directions:
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 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.
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 marine mildew stain cleaners and have found that it removes mildew stains faster, with less effort. |
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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 Remover on:
- Vinyl cushions and chairs
- Rubber fenders
- Fiberglass
- Gel coat
- Canopies
- Boat tops

- 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.
Made in USA

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Review Summary
5.0
14 Reviews
5
100% (14)
4
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3
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100% Recommend this product (14 of 14 responses)
By Mw
Boston, MA
Miracle 31
September 19, 2018
This stuff is AMAZING. If you have mildew on your boat seats I can not recommend this product enough. I thought I was going to have to buy new cushions. They are like New after using this product and I hardly even had to wipe it to remove the mildew. It just melts away. Wish I had a before picture of the cushions, they were black!
ProsAll you have to do it spray and wait.
ConsDoes contain bleach so wear old clothes
By IanK
Chadds Ford, PA
Awesome results
July 3, 2014
Noticed my pool floats had developed mold/mildew spots from being stored over the winter. Washing with a pressure washer and APC did next to nothing, but after one hit with Marine 31 Mildew Remover I swear the spots disappeared in front of my eyes!! I can't wait to see what this product will do to the moldy boat seats I picked it up in the first place for!!
ProsIt works!!!
ConsI should have bought it sooner
By Ed
Rush City, Minnesota
Awesome product
September 22, 2021
After 20 plus years struggling with cleaning my pontoon seat I finally found a product that works! Marine 31 is awesome! I've tried everything on my seats to get rid of the mold/mildew/black stuff on my seats and finally found something! My brother in law recommended it and I couldn't believe it! Great product, with I would have know about it 20 years ago!
By Richard
Texas
The Best!
April 9, 2021
Hands down the absolute best non-caustic mod remover for vinyl surfaces that i have ever found. Never damages the surface it is cleaning but removes the mold instantly and protects against it return for a long time.
ProsEasy to use and highly effective. Works great on vinyl without harming the surface in any way.
ConsAs with any aerosol, wear a mask.
By Ron
Stuart
Marine 31
February 22, 2021
I buy it to use on our showers and it works great ! Best product I’ve ever used!