Plastic toilet pipe in clay pipe joint leak repair

I recently explored under my house and regretted it. I keep finding problems. Although I think it's better now than later when it gets even worse. I just discovered where a plastic waste pipe coming from the toilet is inserted into an old clay pipe running through a cement slab. Water flows from the place where the tube is stuck. What would be the best way to stop this kind of leak? The plastic pipe is very much stuck, and I don't want to pull it out. I'd rather just seal the connection. All I can think of is expanding foam, but I don't think that will be enough. Do you have any suggestions? Thanks, everyone!

It is very dangerous to try to fix this kind of problem yourself. My advice is to seek professional help from a plumber. I worked as a plumber for several years in the company WILCO PLUMBING and saw many unsuccessful attempts to fix pipes or remove blockages on your own. After such work of the client, with a breakdown that is really eliminated in 10 minutes, I had to mess around for a couple of hours. Do not spare the money? otherwise, you will pay twice later. Moreover, I think none of you at home has special tools, without which it is impossible to cope.

Edited by Deirdre265511 - 04 May 2021 at 11:00am