Answer:
Yes, normally we call switchable PDLC film is water-resistance, but not totally waterproof. So putting the PDLC film in water for a short time is no problem.
But if put under water for a long time and kept powering on it, the water can come inside the film slightly from the film edge, and then with electricity and water, minor short circuit might happen then gradually damage the film from the edge, after several months, then the film may not work or delamination at the edge(as show in follows photos).
