Just cross referencing another forum for cooling system flushing info and came across this gem I wanted to share. There are links on ingredients and an MSDS sheet for a Gunk flushing agent. Guess I'm not gonna use Prestone any more.
http://www.yotatech.com/f116/cooling-system-flush-198530/
http://www.yotatech.com/f116/cooling-system-flush-198530/