Gee... I don't recall hearing or reading that someone blew their radiator cap off.  I would think that if your engine is heating up enough blow off a radiator cap, you'd know something is wrong before that.  And, whatever coolant you would use most likely would not fix that kind of over-heating problem.

Even straight undiluted tiger piss probably would not fix your over-heating issue. 

Gnarls. 

Well it was the original cap, the rubber gasket on the cap was almost none-existent, and if I had a leak I'm pretty sure I would have sen it when I flushed the thingl. It happened in stop and go traffic in 105 degree weather with the A/C blowing hard, so it didn't seem too far fetched that the cap burst, but maybe i'm wrong.