At 1.5mm, a piece of tape would come closer than you'd think to being a permanent fix...
The vacuum of space seems drastically hard to keep at bay, but consider that you're only holding in enough gas to replicate sea-level air pressure (nominally 14 PSI or so). A typical soda can is pressurized to between 30 and 50 PSI depending on temperature, beverage etc.
Supposedly the apollo command module had a pressure skin that was as thin as 0.012" (0.3mm) in places.
I did a bit of searching and found that the ISS, along with Soyuz, are kept at sea-level atmospheric pressure (14.7PSI). This is unlike pressurised aircraft, which usually operate slightly below sea-level pressure at flying altitude.
The vacuum of space seems drastically hard to keep at bay, but consider that you're only holding in enough gas to replicate sea-level air pressure (nominally 14 PSI or so). A typical soda can is pressurized to between 30 and 50 PSI depending on temperature, beverage etc.
Supposedly the apollo command module had a pressure skin that was as thin as 0.012" (0.3mm) in places.