Pencool 3000 With Stabil-Aid 300064 Cooling System Treatment - 1/2-Gallon Jug Prevents Formation of Gel Deposits that Plug Radiator Passages, After Coolers, and Oil Coolers Reduces Corrosion, Cavitation Erosion and Liner Pitting Lubricates Water Pump and Other Metal Surfaces to Reduce Wear Controls Formation of Harmful Scale Deposits Buffers pH to Protect Against Acid Caused by Glycol Degradation