Originally Posted by
Milo Dolezal
This is unusual question. Each shower floor needs slope for water to drain away. In your case, you wanna eliminate slope from the floor - and still use it as functional shower.
How much slope do you have ? What's the size of the shower floor area?
Problem is that no matter what type of Mix you put over existing floor, it will most likely crack, especially on the thin end.
You will be better off putting something over it - like teak floor. It is used in saunas. Cut and place the wood so it absorbs the slope while the original floor will remain the way it is. See the pic...