Adhesive Backed Vinyl Paper Makes Gaskets
I used this technique in my Apollo 11 Eagle build to separate the two glass (?) panels in the upper docking window port of the LEM. Only that time I used red adhesive backed vinyl strips. I cut thin strips of black sticky backed vinyl thin enough to fit along the back edge of the bow window rims, leaving enough room for the clear styrene window plastic to fit inside the rim up against the vinyl gasket.