This 3M insulator kit comes with enough film to cover up to five windows measuring 5 feet long by 3 feet wide. This relatively thick film provides enhanced insulation thanks to its thickness of 0. ...

Tinted window films block out the sun's rays to keep your home cooler. CR tested windows films from Gila, Greenfilm, and two other brands.

Do window insulation kits actually work? Yes! They seal off drafty windows so you can spend less on your home heating bills.

Cleaning expert Iwan Carrington shared how you can buy cheap window film insulation kits to act like budget double glazing. He explained: “These windows are just thin plastic so I’m going to ...