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Don from Port Angeles, Washington writes,

What is the shelf life of undiluted Boracare?

I plan to buy some Boracare but I don't have very much wood to treat right now. If I don't use all the Boracare (1 gallon bottle) can I save some (undiluted and in the original bottle) in case I need some more in a few years? If so, how many years should it remain good? How can I tell if it goes bad?


The shelf life of undiluted Boracare is about 3 years. Once diluted Boracare should be used immediately. Boracare that is left for more than a few hours after it has been diluted will start to separate from the water and will be impossible to get back into a proper diluted form. You will be able to tell it has gone bad by the form it is in. It will likely crystallize.

Answer last updated on: 03/22/2015

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