GILA residential window film should only be applied to the INSIDE surface of standard 1/8” single and dual panes. This includes single, dual, removable storm panes, and all window shapes such as patio and French doors, and half-rounds.
Apply film to the INSIDE surface of exterior removable storm panes.
Apply film when the temperature is between 40° and 90°F for at least three days.
Do not apply GILA residential films to plastic or Plexiglas surfaces or to motor vehicle windows.

Do not apply any film to frosted, etched, leaded, cracked, holed, or deeply scratched glass, or any otherwise flawed or defective glass or glass that is over 40 years old.

Handle the film very carefully to prevent creasing.

Installation on larger windows (3-4' wide) is easier with two people.