Hello home improvement folks!

I hope it’s ok to ask for help about my condo since it’s not a house. It’s my first property so I’m learning a lot.

This weekend I opened the showe drain to remove the accumulated after the shower became slow to drain. While cleaning the drain I noticed it was cracked. I thinking about putting some jb weld, flex seal or caulking as a temporary fix to stop the leak. I’m worried about leaking into my downstairs neighbors. I would like to replace this part of the drain, however I’m having a hard time finding information on the different types of shower drains. It seems like most drains are screwed-in, but the green stuff is making be think that mine might be glued. If anyone has some advice or resources I could look at I would be super grateful.