ProSource Liquid Pump Protector 4oz Bottle 6-Pack Protects your spray system against rust, corrosion, and premature wear. Protects against freezing up to -25F or -32C Use pump protector when storing your pump for long periods of time. To use effectively use 4-8oz of pump protector with 1 gallon of water. For max strength add 4oz of pump protector to 1/2 gallon of water. Performs like Titan 314-483, Armor and Karacher pump guard and many others.