Winter is Coming! Ensure Proper Liquid Material Storage

How to Keep Liquid Tooling Material Safe in Cold Weather

Have you considered the storage conditions of your polyurethane and epoxy resin systems during the winter months? If stored improperly, these products have the potential to crystallize.

What is crystallization?
Crystallization is a natural process where solids start to separate from liquids, making the material appear chunky. This will increase viscosity, gel time, and cure time.

How should I normally store these materials?
It is always recommended to store and use resins at room temperature, about 77°F. These materials may start to crystallize if exposed to colder temperatures.

What do I do if my material has crystallized?
Crystallization can be reversed by heating the material. Follow the instructions below to reverse crystallization.

Reversing Crystallization

Crack container lids to avoid gas build up.
Place in shop oven and heat resin to 140°F for 3-4 hours.
Remove from oven and let cool to room temperature.
Mix well before casting.

Please Note: This process does NOT work for materials that have crystallized due to moisture contamination.

Want Extra Protection? Use Freeman 302!

Freeman 302 is an inert gas used to preserve and prolong the usable life of moisture-sensitive polyurethanes.

Before resealing your containers, spray a short burst in the open container and seal immediately. Repeat after every use.

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