You can use except rags, cotton and tape also rubber tubes and belts, and the wider they are, the warmer it will be. It will need to be tightly put into the space between the shutters and the frame and strengthened with tape.
You can use except rags, cotton and tape also rubber tubes and belts, and the wider they are, the warmer it will be. It will need to be tightly put into the space between the shutters and the frame and strengthened with tape.
