Daytime reflective privacy
A reflective exterior can make inward views harder when it is brighter outside than inside. At night, indoor lights can reverse that relationship. Reflective film does not guarantee night privacy.
Different films provide different kinds of privacy. Reflective film can make it harder to see in during suitable daylight; frosted film obscures views more consistently; Blackout film is a separate strong-blocking choice.

Balance daylight, comfort and appearance.
A reflective exterior can make inward views harder when it is brighter outside than inside. At night, indoor lights can reverse that relationship. Reflective film does not guarantee night privacy.
Frosted film obscures what can be seen through the covered area while retaining a designed appearance. A full frost, partial band, pattern or gradient creates different levels of obscuration and daylight.
Darker Ceramic reduces visible light and may improve daytime privacy, but it is not a night-privacy guarantee. If strong light and view blocking is required, discuss a distinct Blackout film and edge-gap requirements.
They may be able to when the room is brighter than outside. Reflective film does not guarantee privacy at night.
It can reduce visibility in some daytime conditions, but it is not a complete or guaranteed privacy solution.