I carry a tube of superglue because I can use it to fix things in the field very easily. NOw I know some of you may cringe at this, but I used it to seal my camelbak one time when I was in the field and it sprung a leak. I have had ab out 50 or more liters out of it I am still fine! I would not use it to close a wound unbless I absolutely had to, mostly because I have a complete medkit in my camelbak anyway.

But Superglue does come in handy when something is leaking or something is cracked or broken.

Garrett
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On occasion of every accident that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. - Epictetus