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Interesting, I was thinking you could use the pressure differential to flow epoxy into the hole before sealing pressure to stop flow and heating to cure, but makes sense that an epoxy bandaid would probably do just as well - probably good enough to just slap that over the hole.

Will they apply to both inside and out? Will epoxy cure properly if totally exposed to the cold low pressure of space?

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Epoxy can cure in a vacuum, as demonstrated by common fabrication procedures (sort of). The temperature isn't actually that big of a thing. Space is "cold" because there's no heat but also nothing to conduct it away. It actually gets quite hot if you're facing the sun as well. Long story short though, as long as there's no gas passing through the hole, it should stay around the internal temperature of the ISS or at least close enough to cure.

Maybe even hotter than inside, since the epoxy reaction is exothermic as it cures.

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