NOCO C506 5 Gal Corrosion Preventative High Volume Corrosion Preventative If your car batteries are experiencing high levels of corrosion, or you just want to have a reserve supply of a protectant, pick up the NOCO C506! This product provides users with 5 gallons of corrosion preventative to protect their battery and even extend its overall lifespan. It can also be stored as a large reserve of backup corrosion preventative in case you run out of your initial supply. A Tried and True Formula The specialized formula of this protectant gives it resistance to reversion, moisture, shock, and vibration damage. It's also easily applicable with a brush for precise use on exact problem areas of your battery. This compound is also environmentally safe, so any accidental spills won't harm grass or ocean water.