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Steam-cleaning vinyl to remove mold stains?

Old 11-14-2020, 10:32 AM
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Default Steam-cleaning vinyl to remove mold stains?

As with many older boats that are being used only half the year, my boat has developed some unsightly mold stains on the vinyl.
We've tried just about everything previously suggested (while staying away from too heavily bleach-based products) without much improvement.
I remember seeing a video where someone used a steam cleaner to get those stains off.
Has anyone ever tried that?
Old 11-14-2020, 10:50 AM
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I once used a steam cleaner with a small scrubbing attachment to clean mold stains on the canvas interior of an old pop up trailer. It actually worked quite well.

The only problem was water condensation from the steam, which would keep dripping over, due to the location of the stains, so I'd have to stop frequently and wipe the condensed water with a rag. But I won't see that being an issue for boat upholstery (if that's the area that you intend to clean).
Old 11-14-2020, 11:30 AM
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I know on cushions you shouldn't do this as if you get water from the cleaner thru the cover into the padding, you will just get mold on the inside. For cushions we brought them to a mobile carpet cleaning person, who did a fantastic job for very little money.
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Old 11-14-2020, 11:41 AM
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If t is surface , mold that can be cleaned away steam works great. If it is under the surface then no good. You will push the mold in deeper and wet the inside of the vinyl. Mold will be actually very happy and grow stronger


Old 11-14-2020, 01:34 PM
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Good info, thank you.
So to give a little more detail, these are little circular mold stains on the vinyl. We have used some bleach products (away from the seams) which killed the mold; it has not been growing for the last 18 months. It just left dark grey stains that we have not been able to remove.

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