3M Indoor Window Insulator Kit (5-Pack)
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Five-pack for five 3 x 5 ft indoor windows, with a one year limited warranty.
🏷️ Familiar brand
Confirm you are buying the five-pack, since 3M also sells a three-window kit.
The 3M kit is a five-pack for five 3 x 5 ft indoor windows. The listing says it saves energy, reduces condensation and prevents frost buildup, and it comes with a one year limited warranty. On Amazon US it was $17.59 on November 3, 2026.
Pros
- Established brand
- One year limited warranty
- Covers five windows
Cons
- Costs more per window than the Duck kit
- Short listing without film thickness
How to Install 3M Window Film Insulation (Ecobob.co.nz)
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