Your post gave me a chance to do a little info searching.
Here's what I found within a few minutes:
(copy the link to your browser)
This link gave me some good info and links:
http://lecglobal.com/chem-rods.htm
This goes to a pretty detailed data sheet:
http://www.ees-group.co.uk/downloads/LEC-Green-%20Grounding%20Manual.pdf
Hope this helps a little. I would like to find out more info, too.
