This self adhesive door seal gasket is for Airstream main doors from 1974 through at least 1994.  It is old Airstream part number 365045 which was discontinued by Airstream.  It's a thick, effective weather seal and the best option for this era.  Read the reviews below to get firsthand advice from other trailer owners.

It is installed on the door's flange around the perimeter with the gasket's profile sloping to the edge of the flange. Our 3M peel-and-stick adhesive is very strong so position carefully. It is not intended to be repositioned after application.

It is made of premium EPDM rubber with a base 1/2" wide (adhesive is 3/8" wide). The height is approximately 5/8".

24 feet is enough to do almost any vintage trailer door.