Plater of Paris and sand mixed

[tonka]

I seen on TV, a guy mixed sand and plaster of Paris to insulate a forage for knife making, anyone have any finer details of this way of insulation? How well it holds up? What temps it can tolerate?

[steam maker]

I think u need blood sweat and tears to make it ! Then life is simple and life is good cause ur livin like u should hey hey hey