Leaking rear window trim

[noperope]

I've been battling a water leak which have ended up with the sides in the trunk collecting water easily when it rains. I finally narrowed it down to the rear window trim in which the plastic mounts that the trim is screwed into seems to have been either cracked or otherwise defect as I have found water drops hanging from the few that I can see from the inside having removed the rear seat. I also feel moisture on the metal below those mounts, which I guess leads down to the sides where the water gathers.

Would these need replacing or would it just make due with some sealant? I have not been able to find any rust.

I also suspect that there might be coming in from the tail lights as well but this is something that I'm still investigating.

 

[GTSBoy]

It's not the trim. The clue is in the name. Trim is trim, not a water seal.

It will be the rear window seal or the boot seal (if it's not actually rust, or a broken seal in the welding seam sealer).