Liquid Sealant for Sewage Pipes: Fix Small Leak in Toilet Drain - Plaster & Tile Covered

Hello, I have a problem, there is a small leak in the sewer pipe, i.e. after draining the water from the toilet, a small wet spot appears under the pipe, unfortunately I cannot pull the pipe out because everything is covered with plaster on which the tiles are placed (flush for installation) is there any a type of sealant that will seal the pipe when poured into the pipe?

Caustic soda. You just have to be careful with that.

then you could write to me how to do it ....? just pour caustic soda into the shell?

Well, what will seal the tiles, I will not take apart ........?

Added after 2 [minutes]:

water glass....?

Choler I was lightly drunk and read "Draining" instead of "Sealing"
I had a leak once, a plumber (Mr. Kaziu) came and bought some sealing compound. She looked and smelled like Butaprem. It was a can, and a tube with a fixative was stuck to it on the tape. He ordered nothing to be poured into the shells etc 2 days before. Later, he unscrewed the toilet bowl and poured the mixed mass with the fixative there. Unfortunately, Mr. Kaziu is already dead, so I can't ask what this "magic mass" is ...

Added after 4 [minutes]:

And he poured it with a bowl on a wire so as to fill the pipe with the mixture halfway up, but if he wanted it and it would flood it all.

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I warn you!
PW

Hello, if you have any idea what this specific is called, let me know, so far I have put the foil under this leak ...

How do we start a new sentence / how do we end the interrogative sentence / spelling?
Please improve on all your posts!
[_P_]

If you have access to this area, after removing the toilet seat, clean the area, dry it, degrease it and use a good PVC glue.
Forget there is a magic agent that will find the leak by itself.
If there is no access, this place must be accessed ...

This access should be made during the assembly of the flush and the housing.
The fact that it is a built-in cistern does not mean that it can be filled completely.
If it is definitely a leak on a sewer pipe, if you find a leak and go there by hand, you can apply sewer pipe glue on the top. The second thing is that in order for there to be a leak in the sewage system, there would have to be a crack in the pipe, which is unlikely, so I suspect that the sewage system is clogged, which causes the water in the pipe to remain in the pipe for a longer time and leak.
In that case, caustic soda might help.
I also suppose that it is a leak on the cistern pipe (gland joint under the cistern) and water is dripping onto the sewage pipe.

Hello, the leak is exactly in this place ... and I am without any counsel on this leak ....

I know that the work is light, but how to reach this seal?

If you feel sorry for the tiles, chose the joint and cut the plaster.

over time, it seals itself with impurities ... thank you