Can Mylar Bags Handle Freezer Storage Long Term?

 

Although freezers can slow the process of spoiling food, freezing food does not stop this process completely. Freezers still cause food to lose water due to evaporation and other factors, but they are three meals delayed. The way that food is packaged is a determining factor in how long food will last; this has been explored in the article titled, "Can You Freeze Food in Mylar Bags?".

Using Mylar bags for the purpose of long-term storage of food outside freezers is common; therefore, it is reasonable to question how these bags will hold up with respect to freezing. Fortunately, Mylar has remained flexible in freezers, unlike many plastics that become stiff.

What is most important is the way that air is removed when packaging food in Mylar. In this case, if air is removed, whether by using an oxygen absorber or manual removal, this will reduce the risk of freezer burn, which is especially important for foods that have been cooked as well as for meats and for sauces, since they are very sensitive to changes in texture due to freezing.

Food that has a liquid-like consistency or has a semi-liquid consistency requires special attention. When a liquid (e.g. water) freezes, it will create increased pressure on the packaging because of the expansion of the water. Therefore, it is important to leave adequate headspace; otherwise, there will be leaks due to pressure on the packaging itself. Another reason for failure in the freezing process is that the container has been overfilled versus a defect in material construction.

Protection from light will also help to extend the length of time the food in the freezer will remain good for consumption. Exposure to light, even at very low levels, has the potential to degrade food; therefore, food that is packaged in light-blocking Mylar bags will have a longer shelf life than food that is packaged in clear freezer bags.

For anyone who is planning to store food in the freezer for several months or years, the information provided in "Can You Freeze Food in Mylar Bags?" will clarify when Mylar is appropriate, as well as give instructions on how to best use these bags.


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