How does that blue gum stuff work?

[sorgoth]

It sticks stuff to walls....but why?

[Iamme]

sorgoth---But why, you ask? Why not? LOL

Do you mean why do they stick it to the walls, or why does it work?

[aerosolben]

Poorly, when you have a powerful fan running in the same room.

A general layman's explanation is that when heated, the chemical bonds in the material relax/break and reform on adjacent surfaces. When the gum cools, the bonds harden again, keeping them attached.