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gobble

Put some RV antifreeze in my freezer last night and it's frozen to slush this morning

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gobble

Is this normal? I put a half cup of the Walmart Supertech -50 degree antifreeze in my freezer and it froze, not solid but slushy. Menards sells a -50 degree Splash brand and another -70 degree product. I might try those tonight to see what they do. I had no idea -50 degree antifreeze isn't really good to -50 degrees.

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vanamp

Burst protection does not mean it won't slush.  It all will start to slush at way warmer Temps than the burst protection lable.  It won't freeze solid till the burst protection number. 

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oldjeep

It is normal.  Propylene glycol turns to slush but doesn't freeze solid and even if it does, it doesn't expand as it freezes like water does

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gobble

ok makes sense

 

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Falko

Yes antifreezes have a slush point and a freeze point. The freeze point is usually what is advertised.

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bamaboy

you sure it was propylene glycol based and not ethylene glycol?  A guy on TT did an experiment using different forms of antifreeze and the EG based stuff just tore apart the metal.  

 

If I don't dry block it, I make sure to use PG based AF

Edited by bamaboy

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