Originally Posted by
fietsbob
Perhaps the wad of sealant was a stronger resistance than the bond between the stem and the rubber of the inner tube , and its Toast.
New Tire time... Irrepairable stem leak. Unless you intend to completely remove the stitching and put a New Tube in and re sew it.
If the tire is still in good shape, sending it to Tire Alert for a new tube may be cost effective:
http://www.tirealert.com/Welcome.html