I'm thinking of doing a version of the penny floor in a small bathroom area, using washers rather than pennies.
The existing floor is poured concrete with underfloor heating.
The concrete is quite rough and ready and a bit uneven.
There'll be a shower cubicle, so every chance of the floor getting wet.
So, can i use Glasscast over an underfloor heated concrete floor and will the finished surface be too slippery for a bathroom floor?

Many thanks