I get where you’re coming from with the polyurethane, but after a few years patching storm damage, I’m not convinced it’s always the answer in Texas. That stuff can get gummy or even peel if the prep isn’t spot-on—seen it more than once on south-facing slopes. Sometimes, good old roofing cement under the flashing holds up better, especially when it’s baking hot for months. And yeah, hose test is smart, but I’ve had leaks show up only after a real downpour with wind… water finds every weird path.
That stuff can get gummy or even peel if the prep isn’t spot-on—seen it more than once on south-facing slopes.
Interesting you mention south-facing slopes—that’s where I’ve seen the most trouble too. Do you think the angle and sun exposure are just too much for most sealants, or is it more about the specific product? I’ve had decent luck with butyl tape under flashing, but only when it’s really pressed in. Ever try that, or does the heat in Texas just defeat everything after a few years?