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I'm certainly not a composites expert, but an expert once told me that the best way to test shelf life was to mix up a batch and test the cure - if it fully cures then it is okay to use. Also, shelf life can be extended dramatically by storing at low temperature. I kept mine in the refrigerator for a couple of years or more. Some epoxies can be stored below freezing, but I'm not sure about Hysol. You can be much more confident if the containers have never been opened, as one enemy is moisture absorption.If it were me and it had never been stored at temperatures significantly above room temp I would use it, but then I'm not an expert, so the conservative thing to do is throw it away. Gary Casey On Apr 12, 2008, at 3:00 AM, Lancair Mailing List wrote:
I'm getting ready to bond the new skin on my Horizontal Stabilizer. I plan to use Hysol because I'm not the fastest goo spreader out there- I want to take some time and get things right before it kicks off.
My question is: what have others done? Given the cost of the project overall I think I'll order up some new and use the old for non-critical areas. Am I being overly cautious? Any opinions received will be just that- what I do is ultimately my own decision.
Thanks- Bill Wade IV-P
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