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Old 01-15-2011, 11:28 AM   #1

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Default PVA Shelf Life

I have a gallon of PVA sitting on the shelf at home... opened it and only used maybe a quarts worth, if that.

Been sitting maybe 2 to 3 years.

Good to use or buy a fresh gallon?

(please, no "why are you using PVA comments)

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Old 01-15-2011, 01:23 PM   #2

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i have used pva that has sat around for over a could test it by spraying some on a piece of aluminum.let cure.check to see if it peels off.then hold it up to the light.if you cant see pin holes in it.then i would say its fine.
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Old 01-15-2011, 10:05 PM   #3

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When I first started with composites I was given half a quart of PVA that must have been at least 2 years old and it worked fine (that is once I figured out how to use it). It was stored at consistent temp in a dark closet though.
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Old 01-16-2011, 05:49 AM   #4

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Not sure that PVA is mixed with....water or alcohol....but you can prob' thin it down if it gets thick. I have some PVA pellets at work that I mix with I can imagine that a PVA solution can just be rehydrated.
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life, pva, shelf

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