It is the ethylene glycol that does the cleaning. If you had a source for the real stuff you could use that and not have to worry aboutthe additives in the antifreeze. I don't worry about them anyway. Not enuff time in the pot for them to cause a problem.

Ethylene glycol will kill dogs, cats, humans, etc. but it is much safer than some of the things people have used to clean engines. If ingesting a few drops or breathing small amounts of vapor would kill you then every mechanic I know would have been dead a long time ago. I am not saying that it is safe, just don't drink it or stick your head over the pot and breath the vapors for an extended period.

Love the way it leaves mufflers looking after a slow cook overnight.

Ed M.