Main usage would be pressure indication. It also lights up when you pressurize it.

Glow doesn't explode, melt, or otherwise change forms for any reason, and it conducts heat, and is a liquid.


...Heat it to 9000+ temp and use it to melt stuff. Lava sinks through it, but if it's hot enough nothing that vaporizes can pass through it.


It's very useful I think. :O