Was recommended to do epoxy coating as a cheapest and no hacking solution previously. You may explore it

I used epoxy + glass flake combo.
Very easy to diy.
You have choice to maintain color of your existing floor tile by using clear epoxy.
Or change the color completely to your choice.
Did the coating for 3 layers and still good until now for more than 8 years already.
Spent around 1K total for 2 bathrooms (decent size bathroom)
Another pro is that it took total around 48 hours to fully cured for the whole 3 coatings.

so.....you plan to hack all the tiles.

then water proof

then cement

then tile back up?

then have a place to discard all the broken tiles

normal office workers dont have the endurance nor strength to do hard labor work.

good luck.

Sorry for asking, but what do these things do?

Good thread.
Contractor charging me Rm600+ per toilet. Will ask him what kind of water proofing he is doing

looks like outlet of sink.

check the floor there for any gaps.

just use this one cheaper,
spray the whole area only

SOS KICAP

above is a toilet floor ? 

then you  also need to seal  the  tiles grout  and the  floor  water  pipe outlet  top /sides..    water can leak off here.

below can do that .

https://shopee.com.my/Sika%C2%AE-Sikagard-7...1301.5410310649

no. check the part where the pipe goes to floor

that pipe is  uncut .  from  top / floor level  to the  angle join  below . 

there  is no gasket/ seal in between . 

my guess .. that leak is a  floor leak .  the  grout between the pipe and  toilet floor .or immediate surround ..there  is a square  plastic top .

there is no way  to check this .
so just apply the  sealant  at all  the  grout and area around the pipe at the  floor .

I also facing the problems like you. But my problem is the pipe connecting to upper condo unit toilet bowl. I also headache don't know how want to solve. Already complaint to management

The water proofing is supposedly done above floor where water leak from. Not your floor OR trying to do sohai method of waterproofing your ceiling from bottom.

Ok. then all you need to do just hack all the tiles, water proof it then with importance to drainage outlet.

the rest just peanut.

Also I just noticed the yellow pipe flange, that suppose be at your unit not below the slab.

you need a small  brush to apply the sika sealant. if dont have .. an old tooth brush that have a sharper front edge is fine.
apply to every grout within 3 feet diameter, the cement joint s around the square plastic top surrounding the pipe.  and every cement/ joint you see.
plus  the  wall/ floor edge  surrounding the outlet. 

wait to dry  in 1 hour  ... reapply the second coat .    i am sure this will fix the problem.  i had similar case.

if still leak ...do again...  and apply to the  whole toilet  floor grout areas and all the  wall/ floor edges. 

i have even seen water leak out of the concrete  beam in the room  next to the toilet .  due to  a toilet floor leak.
after 6 months / or when necessary  you need to apply again  to restore the water proof.
that 1 liter bottle can last many years 
do feedback  the results. 

We hacked the toilet because of this

Clear?

Ts, ur experiment successful or not?

My home also is affected by leaking. Sigh so much headache. How do you all locate the source of leaks?

The problem happens to my side wall next to the toilet. Weird thing is only lower part of the wall 20cm above the floor seems to be affected (paint bubbling). The rest of the wall looks fine.[attachmentid=10874738]