I went with SikaFlex and it worked perfectly and it looks great. I only wish I'd used more masking tape. I find it easier to work with than Pro-Seal. Yes, it squeezes out, hence the masking tape--use a lot. There are two advantages. You can precisely control where it adheres with the primer, and--god forbid--if you ever have to remove the canopy you can cut the SikaFlex with a razor. I couldn't figure out how to do the rear canopy without the screws, but the holes were there already so no big deal. I did not use screws on the roll bar or canopy frame and it looks really good. If you need a gasket to seal the canopy you'll have to use one with adhesive backing, but I didn't use one and it's fine. I've flown through rain with no leaks. By the way, I did the canopy with SikaFlex as well. Good luck!
