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Herbicide staining on vinyl fence (pendimethalin).

Herbicide staining on vinyl fence (pendimethalin).


Old 05-21-18, 05:34 PM
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Herbicide staining on vinyl fence (pendimethalin).

Lawncare company said they used this (Pendulum Aquacap), and it left yellow dots all over a white vinyl fence that they subcontracted me to clean. They have been there for about a week or more. I had bleach and a degreaser with me, but they didnt seem to have any effect. Do you guys know of a chemical that can remove the yellow staining?
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Old 05-21-18, 06:21 PM
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Can't answer your question, but I think I'd pass on that job and tell the lawncare company to put a claim in with their insurance to replace that fence.
Old 05-21-18, 06:27 PM
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Yeah, vinyl absorbs some stains readily... it's probably permanent. Only idea I would have is to try vandal mark remover, (comes in a spray can) which would melt the surface of the vinyl slightly before the solvents evaporate and it solidifies. And I doubt that even that would completely "remove" the marks.
Old 05-22-18, 04:57 AM
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It's a common problem with vinyl. I would try a strong hydrogen peroxide. Other than that time and sun exposure to let the UV rays have a shot at it.

Folding white wooden chairs are very popular for weddings but they require a lot of maintenance to keep them pretty. About 10 years ago the rental industry went crazy switching over to vinyl folding chairs that looked like wood ones. It wasn't long before everyone found out that there wasn't much that could be done to remove stains. At least the old fashioned ones could be thoroughly scrubbed or repainted.

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