Duck MAX Strength Window Insulation Kit (5 Windows)
The classic renter window fix: an invisible film layer that stops window heat loss for a season.
Price range: $ (Budget)
What we liked
- + Heavy-duty shrink film seals the whole window frame into a still air pocket
- + Nearly invisible once heat-shrunk with a hair dryer
- + Peels off in spring; slow removal keeps paint intact
Trade-offs
- - Single-season product, you rebuy each winter
- - Tape can pull loose paint on old or flaking frames
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