There are two types of privacy film: transparent and opaque.
Transparent privacy film can only provide daytime
privacy. Our three darkest
ComforTech Ceramic Series shades provide daytime
privacy: 25, 15, and 05. 25 is the lightest of the three shades and 05 is the darkest.
If you want both day and nighttime
privacy you would need an
opaque window film like our
Matte White Privacy.
No transparent privacy film can provide 100% privacy. You would need to obscure the window completely to do that. That’s because transparent film works by creating a one-way mirror effect on the exterior side of the window when it is brighter outside than it is inside. Because this effect depends on outside light conditions in relation to inside conditions, as those exterior conditions change (i.e. during a storm with dark clouds, a very cloudy day, or as the sun sets) and in turn the interior conditions change (you turn on the lights) the amount of reflection the film creates on the exterior decreases.
You can create night time privacy in discrete situations like an entryway by employing these strategies: (1) make the outside in front of the windows bright at night with house lights or landscaping lighting, (2) dim the interior lights just inside the door or window, and (3) choose a dark film like a 15 or 05. Again, the brighter it is outside, the better the mirror effect will be.