Let's say that we have a gaseous or liquidus compound (I don't know if elements or compounds make a difference, take this as a thought experiment), and we have a tungsten or steel block that's 5cm (or less, you choose) thick. Is there any physical method for that gas or liquid to pass through that thick heavy metal block (not by drilling etc.)?
If my question itself may be unclear, I can provide more specifications or examples if need be. My intention is to find out how deep a gas, or even just a tiny drop of some sort of liquid can penetrate through a heavy solid metal block, and why.

I'm just thinking of a scenario where a gas or a drop lands on the surface of a large thick metal shield. I know that's not a question that can be answered definitively just by
Or put it another way, is there any physically conceivable method for the gas or liquid to turn the tungsten or steel block into a gaseous or liquid form itself from the inside out?

This question was inspired by the "supercooler" concept. Is a supercooled state a solid under extreme temperature and pressure conditions, or it's still a liquid but with special properties, and can we achieve such extreme pressure and temperature in nature or in lab