First time renting in many years and there is a place. Draft to say the least. There are gaps in the windows between them and their sash and I debated this versus the ugly plastic panels to keep my heating bills as good as they would be in New England winters already. Not being able to fix the actual problem and expecting this from my landlord would be unreasonable, I found this and the plastic wrap and decided to test it first. Basically, it's dry putty. Easy to put on, supposedly easy to take