3M Indoor Window Insulator Kit (2120c)

Item no: 58508 | 051131569508
70  Estimated 

Save on this item December 10th through December 24th. Above price includes savings. (details)
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at Your Local Ace

Ship to home is available. Leaves warehouse in 1 to 7 bus. days. (details)
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  • 62" x 84" film
  • 1/2" x 432" tape
  • Insulates two 3' x 5' windows
  • Clear as glass
  • Increases R-value ny 90% over a single pane window

This item can be shipped to your home. Or pickup this item at your local Ace Store for FREE*.

*Items shipped from our warehouse to stores in Alaska and Hawaii will receive a 70% shipping discount.

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What people are saying

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3M Indoor Window Insulator Kit (2120c)

(based on 2 reviews)

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Reviewed by 2 customers

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did the job

By Paul

from sundown,ny

Verified Buyer


  • Easy To Use
  • Weather Resistant


    Best Uses

    • Wnterizing

    Comments about 3M Indoor Window Insulator Kit (2120c):

    Great for winterizing porches

    (6 of 6 customers found this review helpful)


    Best kept secret for energy saving!

    By Pauliester

    from Rockville, MD

    About Me Casual Do-It-Yourselfer


    • Glass Sealed Securely
    • Good Insulation
    • Opens/Shuts Smoothly


    • Not durable

    Best Uses

    • Energy Conservation

    Comments about 3M Indoor Window Insulator Kit (2120c):

    This is an effective product to reduce heat loss on any window at very low cost. Big money saver! It works by creating an invisible, stagnant air gap between the room and the window glass. This is NOT a film that you apply to the glass, but an insulating air gap; do not confuse the two. I think other retailiers do, and they do not sell this product. Buy here and don't miss out on one of the most effective low-cost energy-savers available!

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