Anyone ever use a tire stop-leak goo?? If so, what brand was it and did it work?? Background: I got my boy a tricycle with pneumatic tires. Being a boy, he likes to drive over anything and everything (usually twice). Being in Arizona, everything that grows has thorns/spikes on it. He runs them over (usually twice). He managed to let the tire (inner tube actually) hold air for a little over a month. It is not a split rim, so servicing the tube sucks wet ass. I was thinking of putting some sort of goo in it to see if I can extend the service interval a bit. I went to a caster/wheel/tire shop today to see if they had bullet-proof tubes or tires . But, being that the tire looks the same size as a wheelbarrow tire, but is just a bit different, they don't make jack for it, hence the tire goo question....... Suggestions??