Sealing tail lights - water leak

Joshua Van Tol josh at
Wed Oct 26 09:46:14 PDT 2011

Just drill a hole in the lens near the bottom to allow drainage. That
is after you've eliminated leakage around the lens as the source.

On Wed, Oct 26, 2011 at 10:43 AM, Dave C <dconner at> wrote:
> Water is leaking into the trunk and I think it's from the seal between the
> tail lights in the trunk lid.  This is a 1987 Audi 5000.  I've re-sealed it
> twice already using 3-M strip caulk 08578 but the leak seems worse than
> ever.
> I figure either this caulk is the wrong thing to use, or else there is a
> crack in the tail light which I didn't notice.
> I'm tempted to try re-sealing again with the Audi specific sealing
> material.  It is p/n AKD-497-010-04-R10 (not sure about the last three
> characters in that p/n).  It costs about $60 for a 10 meter roll.
> Does anyone know whether there is a significant difference between the 3M
> and Audi sealing materials?
> Dave C.
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