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This is an indoor window insulation kit: three sheets of clear shrink film, each 42 by 62 inches, plus the tape needed to seal them to the frame. You shrink the film tight with a hair dryer to make a dead-air layer that cuts drafts and heat loss through single-pane glass. It suits renters and owners of older windows who want a cheap seasonal fix without replacing glass. Against magnetic or framed storm-window panels, the film is far cheaper and stores flat, but it is clear plastic that goes up and comes down each season and blocks nothing you need to open the window for.
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Lowest price we've seen: $9.99 on Nov 11 at Ace Hardware. Tracked across 1 store since Nov 11.
Buyers of this type of shrink-film kit generally report that a careful install with a hair dryer noticeably reduces drafts and cold near the glass. Complaints center on tape adhesion and residue, and on film that loosens or tears over a season.
This M-D Building Products Polar Block kit is an indoor window shrink film. It comes with 3 sheets of film in each pack.
The film measures 42 in. long by 62 in. wide. It is made for indoor use.
