Tom wrote: "When I put up the pop-top the seal around the edge of the pop-up
sags for several feet in various places.  I can't see what's to keep this
seal in place, unless I'm supposed to use some sort of glue or sealer.  The
seal itself is flexible and supple.   What's the "cure" for this problem?"
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Look a little closer.  I would guess that the seal in the area that sags is
rusted.  There is a metal clamp/channel of sorts that is molded into the
rubber seal.  This metal clamp grabs the fiberglass and holds the seal in
place.  When it rusts, it doesn't grab onto the fiberglass anymore.

You might try gluing it in place with weatherstrip adhesive.  3M makes it and
you can find it at NAPA.  Comes in a tube like toothpaste, and is made in
yellow and black - I used black but they are the same as far as I know.  It's
a contact adhesive, meaning you put some in the seal groove and on the lip of
the pop-top, let it dry for 5 minutes, then push the seal into place.  Put
masking tape on the pop-top along the line of the seal...this goop is hard to
remove from a porous fiberglass surface, so keep it from going where you
don't want it in the first place.

Hope That Helps.....
Joe in CO
84 Westy
77 Targa