On doors, windows, etc, that are designed to mount but not be adhered, I stick to gaskets...
MD branded self adhesive EPDM works incredibly well, just stick it to the backside of the door, window, etc you are installing.
Just be sure to orient the cut ends on the bottom.
The EPDM is softer and compresses easier than any buytl, so no, no problems with wavy flanges anywhere.Great idea in the gaskets!
Couple questions; on a door or window that is screwed on rather than clamped would the screw go through the gasket or beside it? I'd think the seal could be compromised driving a screw through it.
Also, do you achieve even pressure screwing down the flange with the gasket behind? I feel it'd be tough to not end up with a 'wave' to the flange if clamped too hard where the screws are.
I checked some of the product data sheets and it looks like I'll be going with butyl tape under flanges (possibly a door gasket), and either 3M 4000UV or Teroson MS939 (most likely the Teroson since it's available in grey).
Turns out the 5200 and 4200 are not UV stable unless coated and neither are recommended for metal to wood/fiberglass sealing.
Thanks again everyone!