Caulk 05422-00100-00 tesa® Down Reg PVC foam floor door 1 x 38 x 20 mm (Tools & Accessories)
This low position is a soft plastic roller, very malleable. It sticks to the door easily with tape on top. This is relatively unobtrusive and actually blocks ca well the passage of air. By cons must be careful to place it as well if a song overflowin