

✨ Restore your space to showroom shine—fast, safe, and unstoppable! 🧼
Marine 31 Mildew Stain Remover & Cleaner is a concentrated 16oz formula designed to quickly and safely eliminate mildew and mold stains from boats, homes, patios, and bathrooms. Its fast-acting spray requires minimal scrubbing, preserving delicate surfaces like vinyl and gel coat without discoloration. Highly rated and versatile, it’s the go-to solution for professionals and enthusiasts seeking effortless, effective cleaning.









| ASIN | B0B9DCX1ZJ |
| Best Sellers Rank | #9,927 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #13 in Boat Cleaners |
| Brand | Marine 31 |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,031) |
| Date First Available | October 21, 2021 |
| Item Weight | 1 pounds |
| Item model number | M31-380 |
| Manufacturer | Marine 31 |
| Manufacturer Part Number | M31-380 |
| Model | Marine 31 Mildew Stain Remover & Cleaner |
| Package Dimensions | 11.34 x 5.47 x 2.56 inches |
| Special Features | Concentrated |
D**R
This product works great!!
A friend told me of this product to get rid of mold and mildew stains on vinyl. I have a car that has been in a garage for over 11 years. This product cleaned the seats even down to the creases. It is one of the best products I have purchased in a long time. It is great!!
S**R
easy to use, let the stuff do the work, spray it on in the shade and let it sit.
Literally made my 2006 all white boat interior look new! Almost no scrubbing needed. sprayed it till it was wet, let it sit for 5 minutes, and I have ZERO spots left of black. pure white again!! My seats were covered with black and I was about to have them re-covered (I have a few holes in the seats so I'm headed towards that anyway but this still might delay that by a few years. even my wife commented that the boat seats look new and asked it I had spent some money that we had not talked about 😂
M**O
This stuff works like a dream
My husband and I recently bought a five year old boat from an individual. The boat had been stored in a marina for most of its life, and its white upholstery looked like a Dalmatian’s coat due to mildew spotting. We had already budgeted in a reupholstery job, but figured we’d try to treat it just in case we could save the original cushions. We tried two different products (along with a whole lot of elbow grease) to no avail. I bought this stuff fully expecting more disappointment but was shocked by how well (and quickly) it worked. I sprayed it on a particularly bad spot on the upholstery and turned my back for a moment to pick up my nylon brush. By the time I turned around, the mildew was completely gone. I didn’t have to scrub at all. This stuff saved our upholstery and our wallets. If I ever find myself with a mildew problem on the boat again, I will save myself some time and money and start with this instead.
J**U
AMAZING STUFF!!! I couldn't believe how FAST, EASY, and WELL this stuff works! Spray and ignore!
AMAZING STUFF!!! I couldn't believe how FAST and how WELL this stuff works! EASY to use -- spray and ignore! The only caveat is that it has a strong "bleach smell", so I just turn on the exhaust fan in the bathroom when I use it -- the smell is CLEAN, and that is EXACTLY what it does! When we cleaned out my brother's house after his passing, I "inherited" his garden angels; they were black with mold, but after spraying them with this, and "walking away", they were back to being white! I also sprayed the various bottles in the shower, and the mold, that nothing else could challenge, was GONE! I HEARTILY RECOMMEND THIS MAGIC SPRAY!
M**E
Amazing!
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.
W**.
Works almost like magic - just give it a few minutes.
I had some mildew stains on the windshield cover from my motorhome, so based on other reviews, I tried this. In short, it worked perfectly. I sprayed it on the cover fairly heavily and let it sit for about 30 minutes, until all the spray was dry. Then I hosed it off to get rid of the excess cleaner (it has a strong chlorine smell, so I suspect it would damage the vinyl if left on without rinsing - that’s an opinion, not a fact). When I was finished, the cover looked as good as new. One heads up for future buyers. I used almost the entire bottle on my windshield cover. If you have a lot of things to clean, you may well need multiple bottles. But, it’s easy to use, no scrubbing, and it works. At least it did for me.
M**R
Works fantastic
Good stuff, cleans that dirty boat right up. Moving forward i recommend wearing gloves or your hands will have a bleach like smell
B**K
This stuff makes mold/mildew die and disappear.
Have used this mold/mildew killer several times. It’s the “BOMB”. Spray it on the problem area and let it penetrate for 15 minutes (directions on bottle say at least 5 minutes). I find that the longer soak makes the nasty stuff die and disappear. Then just rinse and dry the treated area. Highly recommended.
Trustpilot
3 weeks ago
2 weeks ago