I had 5 tubes with valve stems long enough for my CF wheels and each of them had 2 or 3 patches. One of them had a slow leak that I couldn't, I ended up blowing it up too much and it popped. I have new tires and tubes ordered, I'll put the new tubes in the new tires when I mount them and have the 4 patched tubes as spares ( I carry 2 extra when I'm riding now that I've had so many flats recently).