I don't know if I got a defective product, I spent over half an hour to completely clean the surface where it would stick, on the first opening of the door it came off

For the job I wanted, they covered me very well. They are suitable for both covering aluminum balcony doors and wooden windows. Very good price

Good quality, I don't know about durability over time, but it helped a lot in reducing heating costs.
Attention:
The surface where you will stick it needs a very good cleaning with a little alcohol and a towel. If you don't do it, it will come off almost immediately.