I think the long term solution is to ditch the tire inflator/goop kit and move to a self-sealing tire. I hope that Chevrolet chooses to start using the Michelin Energy Saver A/S All Season tire size 215/50R17 91H DT (Different Tread) tire that is now standard on the 2017 Bolt with the 2017 and beyond Volt (the self-sealing Michelin Energy Saver tire used on the Bolt is the same tire size and spec (91H) as used on the Volt). Assuming that Michelin can meet the volume demand for this tire there is minimal downside to changing to the DT variation. The current online price at a major tire site for the self-seal Energy Saver DT tire is just over $8 more per tire / 33$ more per set of (4) than the standard Michelin Energy Saver tires. The self-seal Energy Saver tire used on the Bolt weighs 20lbs versus 21lbs for the tire that currently comes on the Volt. Of course you may still want to carry a spare tire and tools for long road trips but having the self-seal tire technology should go a long way in avoiding needing to change a tire because of a tread area puncture.