[TR] Best Anti-Rust Coolant

[William Brewer]

     I need to add/change the coolant in my  TR3. I remember years ago I used
something that I bought at a Toyota dealer ISTR. It may have been called
"No-Rosian" or something like that. What are the best coolants to use in a TR
to minimize rust build-up in the block? I don't want to use Prestone or
Autozone cheapie if there is something good out there.
     TIA,

     Bill in
Tehachapi