Marine 31 Mildew Stain Remover & Cleaner | Effective for Boats, Home, Patio, & Bathroom | Removes Mildew & Mold Stains | Powerful Cleaning Formula | 16oz

Absolutely amazed by how fast this worked! I sprayed it on, let it sit for just a short time, and the mildew practically disappeared with minimal scrubbing. It cleaned years of mildew buildup and left everything looking like new again. I was honestly shocked at how well it restored the surface without damaging anything. Super easy to use, powerful, and definitely worth every penny. If you’re dealing with stubborn mildew stains, this is hands-down one of the best cleaners I’ve ever used. Highly recommend!

This works so great! We were so upset at the condition of the boat seats at the start of this season and I ordered this product on a whim. I am so glad I did! Its so easy to use and gives great results. I just sprayed it on the vinal seats and waiting a couple of minutes and before my eyes the mildew stains melted away. No scrubbing needed! We used the entire bottle in one day for 4 seats and already ordered a refill bottle. Would recommend to everyone!

Works beyond the other RV mold and stain removers. I've tried several brands on mold stains on vinyl boat seats and cushions. I tried the 'miraclulous misting' product, which worked better than Spray9, Mold Armor, etc. But, THIS product Marine 31 took out the stains left behind from MM! Night and day difference. While this is far more expensive per ounce, it is worth it. I would suggest both products: MM for light cleaning to keep up to prevent stains, but this for removing deep set in mold stains. If you want the best, get this one! A fine spray and a magic clean eraser and your boat seats will look like new. Highly recommend.

Used Marine 31 Mildew Stain Remover on my South Bay pontoon that spends most of the year in covered dry storage in Arkansas humidity. After a long winter the vinyl seats had significant mildew staining that I was skeptical anything could fully remove. This product proved me wrong. Sprayed it on — let it dwell a few minutes — light scrubbing with a soft brush and the mildew staining came off remarkably well. The results were impressive considering how long the mildew had been sitting on the vinyl. One thing to be aware of — despite the product not listing bleach as an ingredient the smell is unmistakably bleach-like during application. It dissipates after rinsing but if you are sensitive to bleach smell you will want to work in a well ventilated area or wear a mask. Important tip — thorough rinsing after cleaning is essential. Make sure you rinse the vinyl completely and do not leave any product residue on the seats. Taking the time to rinse properly makes a noticeable difference in the final result and protects the vinyl long term. The important thing is it is safe on marine vinyl — no discoloration or damage to the seats whatsoever. Followed up with 303 Aerospace Protectant after the seats dried and they look better than they have in years. For anyone dealing with mildew on boat seats — especially boats stored in humid environments — this product delivers real results. The smell is a minor inconvenience for the cleaning performance you get. Highly recommend.

I’m not one to write reviews but WOW! This stuff works phenomenal! My boat had built up mold and mildew from the cover being on and this spray took it all off within 5 minutes. Will definitely be buying again. The before pictures don’t look as bad in the photo as it did in person but I’m so happy with the outcome!

It did a fantastic job on my outdoor loveseat glider cushions. I wish I had taken a before picture. The only reason I am taking off a star is that I did not realize it was not supposed to be used on fabric until I started using it, and it had a strong bleach smell. However, when i looked at the label, it does not list ingredients. Since my cushions were tan, I could not see any discolorations except on the back of the cushion, where the back cushions rest on the bottom, which was no big deal. It looks fantastic and is cheaper than replacing the cushions. I do wish Amazon had not shipped this with my Subscribe & Save food items, because it had started to leak, but did not get on anything.

This is great cleaner, it’s the only thing we have found that removes the mold spots from our boat seats. 100% recommendations

This stuff is amazing. My Dads boat sat for 2 years and the seats looked bad. I used this stuff and now the seats look brand new

Crazy expensive. BUT IT WORKS. a lot cheaper than replacing your vinyl thats for sure. I literally tried EVERYTHING and nothing worked. So if you have surface mold and mildew it works in lime a minute. But i had really deep set in mold so it was a process of rubbing it in with a rubber glove. But i would highly recommend.

Great product! Works good

Se produit est incroyable mes bancs étaient plein de petits pico noir je croyais qu’il était scraper mes non il sont revenus flambant neuf wow ces tout simplement magnifique

First of all, yes it works. It removes stains and mildew from most things, but this stuff is simply a very overpriced spray bottle of chlorine bleach. It's extremely obvious as soon as you smell it. They are charging you $60 for something you can buy in a jug for $5. This is such a scam!! Do yourself a favor and put some raw chlorine bleach in a spray bottle, save over $50 and get the same results.