This stuff is amazing. Got it installed to eliminate outdoor smoke getting into the air conditioned rooms and lingering forever. It not only did a great job of that but it also reduced the amount of outdoor noise that came through which made the bedrooms more sleep friendly. Also is a dead guarantee that no ants or tiny bugs can crawl through depending on the type of windows you have etc. It also peels back off after years of installation without taking the paint off the surface it was stuck too which is a big plus. good stuff I highly recommend it except for one small thing. The surfaces you are sticking it too must be totally free of dust or it will be a pain to install and it also may require you to use some sort of finger pressure or roller to squash it down and close the window before it re-expands fully. I was unable to fully close my windows all the way to the point that they needed to be to lock them before i figured out that technique.