pond cement?
Answers:
They don't use much cement in ponds any longer. I will eventually crack and you have a nightmare on your hands. Use heavy duty pond liner, a latex product. It comes in every size up to very very large. It is sold in sheets at most pond stores. A fraction of the time of cement . Cement is also toxic for fish for some time. Nix the cement. Good luck.
Other answers:
simple cement,white cement etc..................
simple cement,white cement etc..................