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HOW DO COR-GUARD INHIBITORS PROTECT YOUR ENGINE? 
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Prestone Cor-Guard Antifreeze/Coolant
With enhanced corrosion protectants
Prestone DexCool Antifreeze/Coolant
For vehicles with aluminum rads, and those requiring Dex-Cool 
Prestone Stop Leak
Stops leaks and seals them permanently  
Prestone Cooling System Additives
Defeats rust and scale to prevent overheating