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
Given that the gas or liquid cannot pass through the block (and I hope this is a consensus opinion), there is a very long and complex chain of events to get it through. I'm starting at the top of the liquid and working my way down, hoping to find out what is the final answer.

1. Pressure difference across block
- if gas or liquid pressure on one side is greater than the other, the gas/liquid won't go