Does hay preservative by Harvest Tec freeze?

This article talks about storing hay preservative over the winter.

Harvest Tec's hay preservatives, such as Baler's Choice, Green Guard, Agco Hay Preservative, Crop Saver, and Thirty Plus, are designed to remain effective even in freezing conditions. They will not freeze. To ensure these products work at their best, it is important to store them in airtight containers. This prevents evaporation, which can occur when the preservatives are exposed to air over time.