Had the same thing on mine, used a general-purpose clear adhesive in the UK
called 'Bostik'. Hasn't cracked off (yet) in several years of the top going
up and down.
(or if that URL doesn't work try )
From: Scott/Michelle <email@example.com>
To: firstname.lastname@example.org <email@example.com>
Date: 19 August 1999 00:04
Subject: rain drops keep falling on my head
>I have recently installed a new vinyl top on my B, and it has a nasty habit
>of leaking from the seam just above the zip out rear window. I was
>if anyone has a fix for such a nasty problem? To be precise the seam would
>be the one that the rear tension bar sits closest to when engaged.