Pro-freeze.

This Antifreeze Is Defective: It Froze Solid

We don’t have any car experts on staff here at Consumerist, but even we know that antifreeze is generally supposed to stay liquid. Yet that’s not what happened to the gallon bottle that C. bought at Walmart, intending to top off his kids’ car. He stored it outside and found the bottle frozen solid when it came time to use it. That would make things difficult. [More]