Rusted cab

[LuckyLightning]

Apologies if this has been covered already, but it's not too easy to narrow down a search here for "rust" and "cab" to find specific results.

I have a significant amount of rust along the top edges of my cab (inside and out). I have another cab that I will restore while I drive this one around (to replace eventually).

My question is: are there any short-term solutions to making this endurable from the elements and noise? I'm kinda thinking I can just fill it in with sealant or filler material? It doesn't need to be pretty or anything, just functional.

Is there another process that is more "normal"? I can't seem to find anyone selling replacement parts of this area of the cab to weld on (everyone focuses on the rockers and cab corners).

The pics:





Thanks!