Does the water on the innermost edge of the rotating ring, which is exposed to the vacuum, NOT vaporize because the absolute pressure is still above 10kPa (100kPa atmospheric - 80kPa vacuum)? [0]

Will the seal slowly evaporate away or absorb into a porous surface like concrete?

[0] https://en.m.wikipedia.org/wiki/File:Phase_diagram_of_water....