The Cortec product we're talking about is VpCI 373. Among the properties
listed on their website a

* Excellent replacement for chromate treatments.
*Good adhesion on surfaces which are difficult to adhere to.
* Multimetal protection
* Excellent primer for aluminum
* Conforms to MIL-P-15328D
....and etc.

I guess I should have given a more specific URL. Try this:

http://www.cortecvci.com/Publications/PDS/373.pdf