Dorbin has a minimum order requirement. Orders smaller than the required minimum have a longer lead time as we need to consolidate onto a "stock" order. If you need a faster lead time, simply exceed the minimum order amount.
Dorbin has put into place extreme price increases and their material has become exceptionally expense and strongly urge you to consider Reese or Pemko as alternates.
Dorbin D-CS Adhesive-Backed Corner Seal - 2"W x 1 1/4"H
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Will prove to be a very effective solution The material is made of bronze and is attached with nails and of course we're assuming that your frame is made of wood and would be a complete kits that you can have your handyman install and it will not only seal the door and be effective for decades but it will completely close the gap in terms of daylight and the intrusion of air