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Old 05-12-2015, 21:02   #16
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Re: Mold on canvass

White or red vinegar?


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Old 06-12-2015, 12:10   #17
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Re: Mold on canvass

White, definitely white

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Old 07-12-2015, 05:41   #18
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Re: Mold on canvass

Lots of misinformation here, At least AD28 looked up the glen Raven cleaning instructions.
Bleach is fine on canvas, make sure you rinse throughly.
The stitching is not affected, uv is the cause of stitching failure along with rough zip use and flogging.
I have cleaned a lot of boat canvas items, including sunbrella plus fabrics and get great results with the Vacuwash process.
Some tips I give all boat owners, canvas is a maintenance item and needs to be cleaned regularly, just a hose and a sponge is better than doing nothing. Do not use a pressure washer or a hard brush. Soak the canvas to get bird droppings off. After cleaning you must reproof with a product, glen Raven recommend 303, I use mclube sailkoteplus, but anything is better than nothing.
Canvas is designed to breathe, so make sure that there is air flow to help prevent mould from starting in the first place.
Canvas is also an expensive bit of kit on your boat, so it does pay to look after it.


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Old 08-12-2015, 15:09   #19
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Mold on canvass

Yeah, my boat is 20 years old, but I only had it three years now. I don't know how old the canvass is. The previous owner took good care of it, and he would probably be pissed off if he saw how it seems to be deteriorating since it has changed marinas that take care of it at seasons end.
This is when it still looked good.

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The top is where the rips and leaky seems are, with all mold growing on the underside.
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Old 08-12-2015, 15:39   #20
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Re: Mold on canvass

Joe, I can see your problem straight away, there is no ventilation in the boat. If you can dont put the aft covers on, or change them to mesh so they breathe.
I've attached a before/after canvas photo similar to yours, Jeff Andersen in NH at Vacuwash can get the same result for you.
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Old 09-12-2015, 21:22   #21
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Mold on canvass

That's pretty much what mine looked like, but mine wasn't to that level yet. The results are amazing. What did he use?

Edit: I just looked at his website. I see what he does. I have to look into sending it to him if I can't fix it by myself. He gets great results.

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Old 09-12-2015, 21:49   #22
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Re: Mold on canvass

Joe, yes the results are great, I do the same process in Australia under licence.
Each time I clean a moldy canvas I amaze myself and even more so the owner.
Once it gets this bad then the Vacuwash process is your only option. Before it gets that bad, you should wash the top down regularly with a soft brush and soapy cold water, even if it looks clean it is not, as dirt will be sitting in the fibers, and this (and lack of ventilation) is what causes the mold underneath.
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