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Old resin and hardener, still good?

Hardener resin

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#1 MikeN

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Posted 11 June 2017 - 09:40 AM

Hi Guys, I have various old rod finishes, about 3 or 4 years old. I have flex coat, Threadmaster high build, diamond 2, and pro kote. The hardener on all of them have taken on a darkish yellow colour. If I use them, will they still apply clear and dry clear? And are the resin and hardener still good? Don't want to finish a Sage with finish that is not 100%. I've attached a picture. I also have some gudebrod speed coat, although never used it on a rod before. It's water based, one coat. Is the stuff good? It's also about 4 years old. Your help will be appreciated, thanks!
Mike
Johannesburg, South Africa


Check out some of my rods here: http://www.ganador.co.za/custom.html

#2 MikeN

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Posted 11 June 2017 - 09:46 AM

Sorry, pic was too large to attach, will post one asap here
Mike
Johannesburg, South Africa


Check out some of my rods here: http://www.ganador.co.za/custom.html

#3 Greg LaPolla

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Posted 11 June 2017 - 01:23 PM

All Epoxies turn yellow.  It will be fine.  If it crystalizes you can heat it in some boiling water or a few seconds in the microwave.  



#4 MikeN

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Posted 11 June 2017 - 01:28 PM

Thanks Greg. Yeah the Flex Coat has crystallized, gone white and hard. Will try the boiling water trick on that one. I've mixed up a sample batch of the Threadmaster and Diamond II and put it on some test wraps, and it seems fine. Will just wait till they are hard and see.
Mike
Johannesburg, South Africa


Check out some of my rods here: http://www.ganador.co.za/custom.html

#5 phg

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Posted 12 June 2017 - 03:22 PM

3-4 years isn't that old, as long as they are kept out of the light, and tightly covered.  These finishes cure by chemical action, not by oxidation (drying), so, as long as the hardener and resin are kept separately, they should stay usable.  If you are concerned, mix up a small batch and test it before attempting to use it on a rod.  In my experience, epoxy that has thickened with age will cure more quickly so you may need to work more quickly.

 

Then, of course, there's always the old adage, "When in doubt, throw it out!"  At some point, it's just not worth the risk to your project.  Only you can be the judge of that. 





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