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Old 10-18-2005, 03:27 PM
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Question for BarryK, MartinSR or??

Am I correct in assuming that even though the catalyst may not have hardened if it has set around for awhile. I have left over catalyst for my k36 primer that I hate to throw away unless it is not safe to use. Thanks for advising me. David Bodily

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Old 10-18-2005, 03:36 PM
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It depends on a lot of things, if activator was sealed right away after using and kept at stable temperature not freezing some nights, it may still be good.

When you are ready to use it look real close in can if you see white specks or what looks like white flakes, its no good.

I have had primer hardeners That I have used over a two year period with no problem but my garage is kept at 60-70 degrees all winter.

Also it depends on activator, some primer activators are more unstable than other activators because sometimes cheaper companies may try to get the ISO level too low witch means the can has a lot of solvent vs Iso's and the iso's become unstable faster.
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Old 10-18-2005, 04:06 PM
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I too have used hardeners that were a year or more old with no noticeable effects. I have read that some people put in inert gas in the can to keep it longer, don't know if it is worth the trouble or not, as I never tried it not having gas bottles yet. I just keep the cans sealed and out of cold weather. If I am in doubt, I'll mix up a small amount of the product at the mix ratio and leave it set overnight and check to see if the next day it has hardened through.
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Old 10-19-2005, 04:41 AM
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Thanks guys
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