Ive never had a problem with that slime in my bike or motorcycle. And I have had both for several years and the tires seem to be in the same shape with the exception of your normal wear and tear.

97 Mystquie GS - I4 ATX died at 168K 94 Pontiac Crap AM SE - 2.3L I4 5spd 2002 Mazda Protege5 - 2.0L ATX