Security Window Film Security Window Film designed to slow or prevent entry from a burglar. If the glass is broken the film will hold the window together preventing or delaying a thief from easily entering your home. A thief's number asset is time and the film takes that asset away. Excellent UV rejection 90% VLT, virtually clear, blocks 99% of UV rays. To Purchase a Complete Installation Kit (includes: Mounting Solution, Squeegee Card and more) click the following link: RMATPROKIT 2 Ply 8 Mil Window Film Width: 30 in Length: 25 ft Packaging: Sold in one continuous roll. Installation Instructions Additional Information: All security films are installed on the interior surface of a window. The best method of installation is to remove the glass from the window frame, install the film, and reinstall the glass into the frame. The frame will act as an anchor to the film. If this is not possible, a bead of clear (or white, if preferred) silicone around the edge of the glass, about 24-48 hours after installation, is highly recommended. This will keep the glass and film firmly anchored in the frame if the glass is broken. Note: Do not apply Window Film on plastic or plexiglass surfaces, motor vehicle windows, frosted, etched, leaded, cracked, holed, deeply scratched glass or glass that is very old (over forty years)