Real world? A real would you don't live in because your not one of these "high end builders' you mention.. Gimme a break :rolleyes:
Have you ever had to coat them? Do you think spraying copper paint on a rubber surface is a game changer?
If you're a "high end" builder you are most likely to use an upgraded gasket instead of trying to spray seal one that's not up to the job.
I think I will just trust the best builders in the business and I won't give out names because that's not necessary but hopefully you won't feel too left out as your name didn't make the list. Have a great day