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Coolant for TIG welding

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52K views 46 replies 28 participants last post by  VPT  
I do use about 15% auto antifreeze. They will tell you not to, but it has worked just fine for 3 years now. i just keep adding water as it evaporates, and about 2 times a year, I pour it into a container, and strain it back into the cooler.
 
Good catch papabear; I do use only distilled drinking water.

Sundown, I recently pulled the whole mess apart, and after 3 years of the same coolant in there, the brass in the torch has no buildup, and no radical heat distortion. So, maybe the cooler co. just wants you to buy their brand, for an extra 75%???

No high frequency, or Harbor Freight issues with my welder yet!!