ISO N.F ANTI FREEZ is Extended Life Coolant – Nitrite Free (ELC NF) is designed to better protect aluminum components in today’s hotter-running engines.
Nitrites in antifreeze are fine for iron parts, but engines now have more aluminum components, including modern brazed aluminum heat exchangers, which nitrates attack, he explained. So eliminating nitrites protects the aluminum parts, and ISO N.F ANTI FREEZ meet the many of the newest OEM specifications and this is long life anti freez.