datlas 

I have a tire question. It actually involves tubeless tires/rims. But it's not bike related.

The kids' car rear tires both have slow leaks. They are way too slow to isolate. One drops about 5 PSI/week. The other a little less. It's an old car with old rims and new tires. I try to get the kids to just pump up the tires at WaWa every 2 weeks when they get gas, but they are slackers so dad ends up doing the job. Sad.

I am suspicious there is just a slight crack or leak at the rim/tire interface but again I can't find it.

I know there are products sold at Auto Parts stores that seal leaks, and I am guessing these are just fancier versions of the goop people run in tubeless bicycle tires.

I am inclined to try this, any pros/cons??