Peel the back side of teh film off first. That will be the side facing the glass.
Sun Blocking Window Film Heat Reflective One Way Mirror Film Anti Heat Indoor Window Tint Privacy Film See Out not in Window Cling 17.5 x 78.7 Inches, Silver : Tools & Home Improvement
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Mirrored Window Film
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Dc fix self-adhesive mirror-effect privacy film is designed to provide one-way privacy to windows, wherever the light is greater. When fitted to the
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One Way Mirror Film vs. One Way Window Glass