how come when gel super glue is on a surface it takes minutes to dry, but when on fingers it dries instantly?
In: Other
Superglue uses water as a catalyst. The water in the air is enough, and the blob hardens from the outside in, moving very slowly because while the water/catalyst is on the surface, it is NOT in the middle of the blob.
Your hands have water on them, too, even if it’s just a little bit.
If you squeeze superglue between your fingers, you’ve created a very thin layer with sufficient water to start the reaction. It hardens almost immediately.
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