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Shelf life on Future?


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Does anyone know the shelf life on future? I have been getting pebbly finishes lately and I was wondering if it is my bottle. Call me a cheap so and so, but I think my boottle was purchased around 1999.

And please don't bury this in the future thread. The question has been asked a few times and perhaps it needs a seperate title from that thread. :cheers:

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I have some future rebottled in Italy by a local supplier. (Paid a bunch - 250 cc).

It is 2 years old and preserved as gold in the dark. It still works for transparencies, but I don't use it as gloss coat. Some minor yellowing appears in the bottle, but doesn't affect the parts.

I don't know if it is the old or new formula but DIETHYLENE GLYCOL MONOETHYL ETHER is common to both.

This is the most volatile ingredient thus its vapour tension is the lowest.

That's one of the reason Future dries quick and cures more slowly.

The pressure inside a bottle is the atmospheric one that was when it was closed last, so I guess that the volatile elements evaporate a little anyway. The more empty is the bottle, the more evaporates.

This is only my opinion, but it would be nice if some expert chemist explained about.

Regards

Euge

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Yes, it does have a shelf life. Partially, this is due to evaporation of solvent, as Euge mentioned, and partially to aging of the polymer. Exposure to ultraviolet, especially sunlight, will cause yellowing eventually. Future is highly resistant to yellowing, but enough UV, for a long enough time, and it will.

I keep most of mine in a very dark, cool corner of the basement. But even then, about 10 years is all you can reasonably expect. If you get more, it's gravy. ;) Y.M.M.V.

You may be able to replace some of the solvent loss with 90+% isopropyl alcohol, but you'll have to experiment with it to find how much you need.

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I've had the same bottle of Future for over 30 years and it hasn't changed color and still does what it's supposed to do.

Just lucky, I guess.

I'm feelin' you. Had mine for 12 years and I live in a somewhat hostile enviroment.
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Don't you guys get anything built??? :taunt:

I get at most two years out of a bottle... :D

I was thinking the same thing. I was also asking myself what I do differently that my Future doesn't last that long...good thing it is cheap :thumbsup:

"Shelf life of Future" is one thing that I don't think about or have to worry about.

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