additive for leaking seal

[Joan Kotjarapoglus <jkot+@pitt.edu>]

	The rear output shaft seal going from the power divider to the
rear differential  on my 94 100cs quattro is leaking.  Is there an
additive that may stop this leak.  I will be contacting the dealer
shortly and wanted to know range of options since I am past 50k.  Also,
has anyone pressed a leaking seal as a driveline warranty claim past 50k 
and what was audi response,  My car is still under 60k.   Thanks
 George k    jkot@pitt.eduk.