Stahlman's ooze was a substance released from the ground as a byproduct of the drilling conducted by Professor Stahlman.
It was a green, viscous substance which originated under the Earth's crust and defied analysis. When it came into contact with human flesh, it altered them in both a physical and psychological manner, making them crave heat and turning them almost rabid. These humans were called Primords. (TV: Inferno)
The Glasshouse was later known to have held a sample of the ooze for study. (PROSE: Who Killed Kennedy) It was also used to transform a Doberman Pinscher into a creature known as the Stalker. (PROSE: The Scales of Injustice)