Sealing tape for the window frame

Hello,
it is clear that there must be a seal with suitable tape from the frame to the window.
Therefore the question, for the window there is a bar (see photo), is it better to use one sealing tape or rather two that are then glued between the bar.
Thank you

You probably mean Kompriband?, if it is available that wide I would take 1 instead of 2 side by side.

Always these quick-click zooms without any context - held very close, but guessing games.

Would do two and leave the bridge free I don't even know if it even exists in 70mm wide and imagine it to be difficult... it should seal something glued around the corner rather won't work

Kompriband is called Kompriband because it is installed compressed and after some (short) time decompresses and fills the cavity between the window frame and the rough window opening (ideally airtight and at the same time insulating). The window is of course fixed / fastened accordingly beforehand. At least that is how it is intended. And of course it also works "around the corner." There are so many other / worse methods. I would prefer this one. Kompriband is probably more expensive than a combination of (from outside) driving rain protection + construction foam + airtightness layer inside ("adhesive tape"). BUT the better solution. We got to know both methods on the house. We would have very much preferred to do without one of them (the latter method at the windows was poorly executed by supposed professionals). Kompriband at the doors was perfectly implemented. Other trades were surprised by the "arrogance" of the door builders who said he didn’t even want to show up for the BlowerDoor test. His work was perfect and airtight... and yes, he was right! The window builders were there for hours before and on the day of the BD test some rework still had to be done. Both methods certainly work, but from my personal experience I would just prefer the Kompriband method.

We used [Kompriband] at the top and on the sides and foam and adhesive tape inside and outside. [Kompriband] with us, however, not around the corners at the top but overlapping. So the top is longer, so that it could be folded downwards. As far as I know, it must not be used at the bottom because it is not load-bearing and the mounting blocks would compress it = no more insulation effect. So foam well there for insulation and adhesive tapes (the right ones) for airtightness and rainproofing both inside and outside. The windows and doors were also not the problem during [BDT].