Review on 🚪 3M Outdoor Patio Door Clear Insulation Kit for Large Windows and Sliding Doors, Heat/Cold Insulation, 1-Door Kit - 7ft. x 9.3ft. by Shane Picot

I didn't buy this for a door but for double windows larger than the 3M window pack. This product has worked brilliantly over the winter months! I wasn't expecting it to stay flat as it's normal for the plastic to turn into a large bubble as air pressure increases, so I left some slack when applying. I also made two lines around the window of the tape that comes with this item. Also, I attached it to the wall on the outside of the window rather than the window pane as I felt it gave better coverage and less chance of leakage. One thing I think almost everyone would agree - I wish the glue was stickier! If it weren't for two rows of tape, it would definitely have come undone.