A number of years ago, I was working on a movie where we cast a “concrete” wall out what ( if memory serves( yeah right!)) I remember as Pyrosil or Pyro-sil .
This product is not it.
This was a plaster that, for lack of a better description, seemed to have alka seltzer in it. When you poured water in it, it rose up like yeasty bread and then set. The end product was a very pourous and wet casting.
A few days in a container with a heater, presto! Breakaway blocks!
Well, I need it again and I cant find it.:smack:
Any FX guys out there? Refractory folks?