May I ask where are you going to use it? It actually requires no mixing since it is a cement-based material containing specially selected sand and cement.
Do you have any photos, to begin with? Maybe the problem is on the tank or in the system itself. The hisses for about 15 secs but no water drains through the tundish is not normal.
rmoore853 wrote:I don't know what he is thinking but I do find it funny. It's amazing how he tilts the tile since it will break easily once hit by the chisel.
I agree with you. But I don't know if he uses a chisel on this. Maybe a grinder?
I was surprised how high the bill was knowing that you bought the materials needed for the work. You should strongly disagree with his demands since it was not discussed on the first day. Dealing with this issue to the court would be the perfect solution.