Review on 🚫 100% Light Blocking Total Blackout Window Film - Room Darkening, Non-Adhesive Privacy Film for Home Security, Day Sleep - Easy Removal, UV Prevention Treatment (17.5 x 80 inches) by Matthew Gomatham

I love this window film! It's perfect for nocturnal werewolves like me as it completely blocks the light. Installation was relatively easy, but I would suggest leaving a quarter inch on each end, smoothing it out with a squeegee (I used a credit card) and then tucking the ends between the window and the trim it covers, if possible. I would recommend one sheet for each window pane if you don't mind the look of the overlay. It's quite a thick material and I don't know if the overlap will stick as the exposed side is rough to the touch. A photo is a comparison where the left window pane is closed and the right one is not and you can see that no light comes through. Another way is to compare overcast and uncovered at the same time of day. I highly recommend.