On my 300ZX, I've used Fix-a-Flat on a few occasions, which kinda worked, but for som reason that car is rather prone to tires deflating.
When I took it to the tire shop, the guys often mention how poor of a condition my rims were INSIDE the tire, due to corrosion from the fix-a-flat stuff. causing the chrome to peel apparently, making a poor seal.
2005 Starlight Black Elise, -hardtop/touring/black interior/sector111 carpet buttons!
2008 Infiniti G37-S
2012 Mazda3i Grand Touring Hatchback w-SkyActiv
1974 MGB Roadster
(1991 300ZX 2+2 - RIP
girl, you treated me well.