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Mold Problem

Old 12-28-2019, 04:29 PM
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Default Mold Problem

Hi All,

I am cleaning out all the mold from the cabin and under the gunnels, etc, on my 21' Hiliner. I previously just thought it was dirt that had settled into the open, porous fiberglass surfaces, but i've determined its mold because every time I unwrapped the boat in spring, there is a a bunch of mold in the cockpit that has to be cleaned up. So before i seal it up for the winter, I want to tackle the problem once and for all.

So my question is, once I've got itt all cleaned out, what can i paint those surfaces with to prevent the mold from making another visit? As I said, it's the porous fiberglass surfaces that are affected, nothing with gelcoat, obviously. So would a bilge paint be good? Or is there something that would be better at sealing up those areas, and keep mold from settling in there again?

Thanks in advance.
Old 12-28-2019, 05:28 PM
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The mold will grow on anything if there is not enough ventilation. A coating will make it easier to clean but won't keep it from coming back. Install vents everywhere you can and sray down with bleach water a couple times a year.
Old 12-28-2019, 05:35 PM
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Default Check out this product it might help you

This is a great product you can read about it online fairly harmless you could use it on cutting boards to kill salmonella it oxidizes mold

Instantly no rinse nontoxic
Old 12-28-2019, 05:39 PM
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Originally Posted by Bruce1505 View Post
This is a great product you can read about it online fairly harmless you could use it on cutting boards to kill salmonella it oxidizes mold



Instantly no rinse nontoxic

Thanks - that's great but i am just using a bleach and detergent mixture, working great to remove the mold. But what i really need is a way to seal up those porous surfaces the mold loves so much... I know mold doesn't like oil-based paint, so i was thinking bilge paint. but if anyone has any experience with another kind of coating, i'd love to hear about it.
Old 12-29-2019, 06:52 AM
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Vinegar works well too and is less harsh then bleach.
Old 12-29-2019, 07:33 AM
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Bleach on mold can make the mold problem worse. I would get some ventilation and a commercial mold remover
Old 12-29-2019, 08:59 AM
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Mold armor is what I have used with success for the past several years. I have a bottle of 303 mold remover and preventer that I will be using next.
Old 12-29-2019, 09:08 AM
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Originally Posted by WPBTH;13222027[b
]Bleach on mold can make the mold problem worse[/b]. I would get some ventilation and a commercial mold remover
How? Just about every mold product I have seen contains bleach.
Old 12-29-2019, 10:06 AM
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Originally Posted by fishingfun View Post
How? Just about every mold product I have seen contains bleach.
depends on the surface, pouras? Don’t use it



https://moldblogger.com/3-reasons-wh...to-clean-mold/
Old 12-29-2019, 10:24 AM
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I have been using damp rid with pretty good results. The bag is usually full come spring time.
Old 12-29-2019, 10:25 AM
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There's a reason bleach is used. It is VERY CHEAP AND VERY EFFECTIVE. My house wash recipe is 3/4cup bleach to 1 gallon of water. A little dwell time is the key.
Why not clean the mold up and paint it with topside paint? Many people have used Rust-Oleum topside paint for the moldy underside of hatches (myself included). Then either ventilate or do a quick diluted bleach wipedown when you uncover. Simple, inexpensive and effective. Looks great, along with being easier to clean the next time.
Old 12-29-2019, 12:07 PM
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concrobium mold control-home depot or lowes- bleach alone will not solve the problem even though most mold removal products contain some bleach
Old 12-29-2019, 02:25 PM
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after you clean it put a couple buckets of cat litter in there works like a charm
Old 12-29-2019, 02:30 PM
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Clean with bleach and water and before wrapping spray with an algaecide. Something like wet and forget should work. Wash well upon spring commissioning.
Old 12-29-2019, 04:01 PM
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Originally Posted by marlinlane View Post
concrobium mold control-home depot or lowes- bleach alone will not solve the problem even though most mold removal products contain some bleach
absorbs moisture?
Old 12-30-2019, 06:42 AM
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As stated,you sealed the boat up too tight with the wrap. You need to have plenty of ventilation,then add some more.Boats under shrink wrap are big terrariums,especially the blue wrap.
Old 12-30-2019, 12:11 PM
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Originally Posted by muskamoot View Post
As stated,you sealed the boat up too tight with the wrap. You need to have plenty of ventilation,then add some more.Boats under shrink wrap are big terrariums,especially the blue wrap.
Well actually the boat came with the mold problem - it's a 50-year-old hull. And I don't shrink wrap, I use a cover. But you know, thanks for the help.
Old 12-30-2019, 12:29 PM
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Guys - thanks for all the advice. I'm definitely going to check out some of those other mold-removal products, bleach is kind of rough to work with, especially in enclosed spaces. And I will definitely look into some further ventilation come spring.

But this thread was really asking about paint products. Once I have the mold cleaned up, what's the best thing to paint those surfaces with? They are fiberglass , but semi porous, not gel-coated, in the cabin and under the gunnels, etc. I want to seal those surfaces up so that the mold doesn't have as friendly an environment in the future. And when and if I do get some mold in the future, it will be much easier to remove.

Since this project is kind of a huge PITA, I'd like to achieve the most durable, most mold inhibiting finish possible, and not have to redo it for a while.

Do you think I can use something like this? I've read on some other blogs about it being used in sailboats:




or even this:




or am i better off with this:



or this:




thanks again for the help.


Old 12-30-2019, 02:47 PM
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303 works great but its expensive. Nice that it can be used on headliners and carpets.

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