I would not rely on CA that has been opened for 6 months. You can tell pretty quick by the dry time that it is not any good.
Agreed Steve. My only "maybe" would be that stored in the fridge.
I don't have an answer for this particular case however, I can testify that products such as the CA, accelerator and many other identical products, do really improved considerably their shelf life, when store in a fridge.
In fact, for countries such as Australia where hot weather is common, some products don't last long, after they have been opened for the first time.
I have bought a bigger fridge for the kitchen (house) some time ago, so that I could store some of my glues however, adding bigger portions all the time,(about 1 gallon [16oz bottles] at the time, between viscosities, particularly 5cps) and the wife still have enough space for the food, etc but, these last few months, has been a struggle for her to fit the products from the shopping day, after I started to add a few extra bottles that I normally keep out but, with temperatures over 40° celsius and low sheds that reach over 50° Celsius in those hot days, such as the ones we are experiencing now (Summer), the bigger fridge become too small for everything so, I had to purchase small bar type fridge to put in the work-shop will all the stuff I had in the house fridge, I was amazed on how quickly I filled that small fridge, right to capacity. I have manage to maintain the new fridge inside temp at 5° Celsius though these scorching hot days...!
What I'm trying to say is, unless your place is cold all the time, CA, accelerator and identical items can last a lot longer (life spend) if kept in a fridge. It cost me $200.00 to buy this new bar fridge (128lt capacity) with a 3 star rating, I can tell you that, in these last 5 years, the amount of money lost in CA, other glues, accelerator, paints, and any of these type medium to short shelf life that I lost, I would have purchased 5 of these fridges, the little power they use per year, is a good investment no doubt, no forgetting that, being in the work-shop, you can have a cold drink, whatever takes you fancy, in those hot days on when you want to have a brake...!:wink::biggrin:
Cheers
George
