On a tight budget or have a temporary shielding situation” This lightweight conductive plastic film is a good choice. Great for windows and walls. Easy to hang with tape or tacks, and easy to trim with scissors. Can be grounded, surface resistivity is 109 Ohm/sq. Shielding performance is adequate at ~90%. Also has anti-static properties. Very low cost per square foot. May be vacuum/heat sealed. Slightly mirrored finish provides dimming effect (some light penetration). No adhesive on this material. Made in USA. Generous 90 feet, 2.9 mil thick. Available in two widths, 24 inches or 36 inches. Whole rolls only.