After the sealant cures, hose down the patch from several directions. Or wait for real rain—it’s free. Go inside and check for drips. If you see nothing, congratulations. You are now the proud owner of a dry, slightly more annoying metal roof.
If it still leaks, don’t cry. You’re not a failure—you’re in the second chapter of a 3-chapter story. Add a second patch, or shift your detective work. Leaks are like whack-a-mole; sometimes you need to hit a few before you get the big one.
Now go have that beer. You earned it. And remember: a tiny leak is just nature’s way of reminding you that you’re not a robot. Or a fish. But you’re definitely drier than you were an hour ago.