[gamache]

Nothing, really. It's food-grade plastic and it will come out the other end.

Now, what happens if you seal high-pressure hydraulic oil systems with it? Let's find out! https://www.youtube.com/watch?v=D1RYVSmuOmc

[giantg2]

What if it's chicle, does it differ?

[ASalazarMX]

It would be an achievement on itself to find true chicle, the vast majority of chewing gum worldwide is synthetic rubber.

[giantg2]

There are several chicle gum companies out there. I forget the name, but I bought some. It comes in pellet form instead of sticks or bricks.

Edit: "Simply Gum" is the company I tried.

[metadat]

Why is the pressure gauge full of liquid? (Presumably water? but why / how?)

Quite the talker there :)

Edit: Got it Shog9, thanks!

[Shog9]

Probably not water. Purpose is to dampen vibration, making the needle easier to read and possibly protecting the mechanism a bit. https://tameson.com/pages/liquid-filled-pressure-gauge