Also found therminol (therminol.com)
There's a whole sleuth of products out there that perform better than the glycols, and bonus, some are environmentally friendly, and non-toxic!
Also found
www.nu-chem.com/heat.htm, a company that makes heat transfer fluid for optician labs.

anti-corrosive, and self cleaning!
This is my favorite:
http://www.anl.gov/OPA/logos19-2/nanofluids01.htm Looking for an additive? Try copper!
Here's a bit of theory
http://www.process-cooling.com/CDA/A...4,7424,00.html