ᐅ Door seal keeps coming loose – what can be done?

Hello, the seal on our exterior door regularly comes off completely. I put it back in place, and it holds for a while. But that can’t be the intended solution. Is it possible to glue it? And if so, with what?

Thanks!

I would only put a few small dabs of silicone into the groove; that should be enough.
Of course, you can also use other adhesives, such as Soudal Fix All Flexi. It bonds everything reliably and is watertight. However, if you need to replace the seal in the future, it will be difficult to remove.