Continental buyers see a fire demonstration on a Durasteel fireproof door.
M/S of a piece of corrugated iron with a fire burning a hole through it.
We then see a fire demonstration on a Durasteel fireproof door fitted to a chimney. A man takes notes as the door is subjected to intense heat from the fire on the other side; we see flames coming out of the chimney top. C/U of heat regulator dial. The temperature is written on a board in chalk.
A crowd of continental buyers watch the demonstration and look at their watches. The door is opened and a man trains a hose on the door, to show that it will not buckle.