Finally got down to the basement and grabbed the pint bottle of CXM.

Made by: Corrosion Technologies Corporation,
Dallas, TX
Phone:1-800-638-7361
TX# 214-271-7361

Now, I was joking about putting it in the cooling system, but here is one of
the claims on the label:

Is exceptional in its ability to stop electrolysis between dissimilar metals.

Other stuff:

Has a dielectric of 40 KV. So it may be used on electrics, even motors!

Cheers,
 Mark