Dissolved oxygen in coolant functions as a catalyst that drives oxidation of metals in a cooling system. No-Rosion contains oxygen scavengers that chemically remove dissolved oxygen from coolant, thus preventing this type of damage.
Polymer dispersants in No-Rosion prevent hardness in water, and inhibitors in antifreeze, from dropping out of solution to form gels. These insoluble materials adhere to surfaces inside a cooling system to form scales and deposits that cause overheating. These polymers also provide lubricity to the water pumps. For this reason, it is not necessary to use a water pump lubricant when No-Rosion is in a cooling system.
For heavy duty/diesel applications, No-Rosion contains nitrite, which prevents cavitation erosion of wet-sleeve cylinder liners.