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Triairius t1_j2ugj9b wrote

Reply to comment by graebot in Molecularly, what make pine pitch sticky? by orangegore

I am actually unsure, but I suspect it might be the same amount of sticky, as there is still no air getting in to regulate the pressure. However, the tar itself might react to a vacuum somehow.

These are just my thoughts, since your question intrigued me. Someone else will hopefully provide an informed answer.

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graebot t1_j30yk7p wrote

If there's no atmosphere, then there's no pressure to press things together. Suction cups, for instance, do not work in a vacuum. They require atmospheric pressure to press the cup to the surface. If part of tar's stickiness comes from the suction effect in an atmosphere, then at least some of that "stickiness" must disappear

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