Feature: Heat Insulation & Energy-Saving: This one-way window film could block out 99% of UV rays, reducing fading and aging of interior furnishings. Besides, it can retain heat in winter and keep it out in summer, reducing expensive heating and cooling costs and 15% of VLT helps effectively reduce glare. Glue-Free, Easy to Install: This self-adhesive window privacy film is free of glue design, no chemical release, very easy to install, just make sure the window surface is completely clean and free of any blemishes and peel off the backing protective film, paste it to the window and use your hand to press it from the top down so that it can tightly attach to the surface. &nbs.