What tools are needed to reseal shower drain in mb bathroom 2 story house?

How to repair leak of water in a 2 story mb shower drain?

Hi USP,
You piggybacked onto a 6 year old thread so I gave you one of your own. Your question is impossible to answer since you have furnished us with nothing to work with, What type of shower? Custom tile? Plastic enclosure? What? What material are the drainage pipes? How old is your house. Details! Give us something to work with here. Back to you, Tom

One post and gone with the wind? If you answer some of Tom's questions I am certain we can help. Based on what you have told us so far my only answer is a tube of silicone from underneath. Of course we would never use a tube of silicone if you tell us more.