^^Waste of money if its not leaking air. Just use some soapy water where the nail punctured to see if air is leaking out. If its not, pull the nail out and forget about it. I can't even tell you how many nails i've pulled out at the shop that didn't leak air and never once had a comeback. Of course I always tell the customer about it anyway just so they know.
If it is leaking and not towards the sidewall, just take it to a shop to have it patched.