Korfaise was a type of gas utilized in starships as a coolant. This gas, which had a white color, presented a breathing hazard. However, due to its lighter-than-air properties, it was simple to evade in non-enclosed spaces.
The YT-1300s class of ships were known to rely on korfaise gas to cool their primary engine. In one instance, Han Solo successfully disabled a vessel posing as the Millennium Falcon by employing Leia's recently built lightsaber to sever the coolant conduits. This action resulted in the release of korfaise gas within the ship, rendering multiple Noghri aboard unable to function.