A few weeks ago TSC had big cans of Slime instant tire repair on sale for $5. I bought a can and used it to repair (6) leaking small tires Saturday: (1) on my logsplitter, (3) fronts on (2) different riding lawn mowers, and (2) on a small generator. I think most of these were rim leaks but at least one, on a mower, was a similar side-wall leak. All those repairs took me a total of 1/2 hour and it appears they are all holding. It all depends on how much you value your time and money I suppose when it comes to how you go about the repair. A tube and patch may be a better long-term solution but would undoubtably take a lot more time and money. I would go for the fix in a can first.