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"The seal has to accomodate the dynamic range "
And again, every maker/supplier has technical data sheets and often architectural drawings showing eactly how to seal it properly--and how to seal it improperly, as well. You can't just screw the stuff in and expect it to work well. You CAN easily set up seals that will work for a long time.
Then there's also 3M's new VNC? VBC? double-sided tape, designed to hold large sheets of architectural glazing to metal and FRP substrates, with enough flex to hold it properly for a very long time with no leakage. It is being used on both skyscrapers and ships, it is new but information can be found on it.
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