Step-by-step

1
Wipe the window trim frame clean with alcohol wipes so the tape sticks.
2
Apply the double-sided mounting tape around the outer edge of the window trim.
3
Cut the clear insulation film a couple of inches larger than the opening.
4
Press the film onto the tape, starting at the top and pulling it snug across the frame.
5
Run a high-heat hair dryer evenly across the film to shrink it tight and wrinkle-free.
6
Trim the excess film close to the tape for a clean, nearly invisible finish.

Common mistakes

• Skipping the alcohol wipe so the tape lets go in a week
• Pulling the film crooked before it's taped down
• Holding the dryer too close and melting a hole

Maintenance & next steps

Peel the film and tape off in spring; reapply a fresh kit next winter.

When to call a professional

Not usually needed — but call a pro if the window itself is rotted or won't close.

Editor's note: This is instructional content for How to Install an Indoor Window Insulation Shrink Kit. Replace with your own firsthand experience and photos before publishing.

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