The longest I have had solder paste in the refrigerator that was still 
usable was about five months. I left it in the syringe that it came in 
and used it a couple of times over the course of these months. I 
understand from discussions I have had with colleagues at work that this 
was stretching it a bit.
Madhu

Vic Fraenckel wrote:
> I would like to use SMT paste solder in syringe form for my modest PCB 
> construction. I understand that this stuff has a shelf life which can be 
> prolonged by refrigeration. My local distributer can supply this to me from 
> Kester, but I need to buy 5 tubes at a time. The price per tube is good, ~6 
> bucks/tube. I would like to know what is a practical (not theoretical) 
> refrigerated shelf life for this? Is there a better place to purchase it? Is 
> it a crazy idea?
> 
> Any enlightenment will be appreciated.
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