> you already have a run flat, so it is redundant.


I have such a kit (Slime) even though I have runflats, as if I can stop the leak and reflate, I do not have to worry about ruining the runflat by driving too far or too fast. I figure the runflat feature gets me to a convenient and safe place to use the Slime, and the Slime gets me to the tire store of my choice without damaging the tire.