The kit includes one durable 62 x 210 inches and 84-foot roll of mounting tape that is double-sided to make attaching it easy. Each kit comes with enough material to cover five 3 x 5 windows, so ...

Duck Brand Indoor 5-Window Shrink Film Insulator Kit ($24.20) Amazon For $24.15, you can insulate up to five standard-sized (3 by 5 foot) windows for a drastic uptick in energy efficiency.

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