One of the best options for preparing foods for long-term storage is Mylar bags because they can hold your food away from oxygen also protect foods from moisture and light and prolong its lifespan if used properly. Mylar bag food storage is a great tool for long term food storage as well as emergency preparedness or simply for everyday pantry organization.

When putting your food in mylar bags, first put dry food into the bag then add an oxygen absorber. After that, take out any excess air and seal the bag shut with a heat seal. Once the bags have been sealed, keep them in a cool, dark, and dry place to preserve the maximum shelf life of your food.

This article will show you how to properly store food in Mylar bags, what supplies are needed, common errors to avoid, and general usage.

Why Use Mylar Bags for Food Storage?

The use of Mylar bags for food storage is due to their composition of layered PET film and aluminium foil which provides an effective barrier to moisture and oxygen. This barrier is what helps to delay spoilage of food, oxidation of oil in the food and contamination of food by pests.

When used with oxygen absorbers and sealed properly, Mylar bags can be used to keep dry foods for years if stored correctly, which has made them very popular for bulk food storage, emergency food kits and planning for the future.

What Foods Can you Store in Mylar Bags?

Foods that are dry with little moisture in them have been shown to keep the best when put into Mylar bags. Some popular foods stored in Mylar are:

• Rice
• Coffee Grounds
• Coffee Beans
• Flour
• Beans and Lentils
• Pasta
• Sugar and Salt
• Candy
• Snacks
• Dehydrated Foods
• Powdered Milk

In general, you don't want to store high-moisture content or oil-based items in Mylar bags, as these types of food could spoil even if there were no air present.

Materials Needed for Food Storage in Mylar Bags

To Start, Gather the Following Supplies:

• Food-Grade Mylar Bags
• Oxygen Absorbers (Optional)
• Heat Sealer or Iron (Optional)
• The Food you Plan to Package
• Labels/Markers unless you are using Printed Mylar Bags

It is important to use the correct-size oxygen absorber. If the oxygen absorber is too small, oxygen will remain in the bag. If the oxygen absorber is too large, no harm will be done, but it is excessive to use.

The Statistics

• Properly sealed Mylar bags with oxygen absorbers can extend the shelf life of dry foods like rice and wheat to 20 to 30 years under cool, dark conditions.

• Oxygen absorbers reduce oxygen levels inside Mylar bags to below 0.1%, which significantly slows oxidation and insect activity.

• Mylar bags block up to 99% of light transmission, helping prevent nutrient degradation caused by UV exposure.

• Compared to standard plastic bags, Mylar bags have an oxygen transmission rate that is up to 100 times lower.

• Dry foods stored in Mylar bags maintain up to 90% of their original nutritional value after 10 years when stored below 75°F.

• Studies in food packaging show moisture vapor transmission rates of Mylar as low as 0.5 g/m² per day, making it highly effective against humidity.

• Adding oxygen absorbers to Mylar bags reduces insect survival rates in stored grains to near 0% within several days.

• Shelf life of flour stored in Mylar bags with oxygen absorbers can increase from about 6 to 12 months to 5 to 25 years, depending on storage temperature.

• Mylar bags are commonly made from biaxially oriented PET film, which is up to 5 times stronger than standard polyethylene film of similar thickness.

• Long term food storage failures are linked to heat more than any other factor, with every 18°F increase in storage temperature cutting shelf life roughly in half, even when using Mylar bags.

How to Store Food in Mylar Bags: Step-by-Step Instructions

1. Ensure that the food is properly dehydrated and stored at room temperature before placing it into Mylar bags
2. When putting food into Mylar bags, it is important to leave at least two inches of headspace above the food product
3. Using oxygen absorbers (optional)
4. Remove any air from the Mylar bag, gently press down on the bag before sealing it
5. To seal the Mylar bag, you can use either an iron or a heat sealer (optional)
6. When sealing the Mylar bag, label it with the contents and the date on which it was sealed
   

Storing Mylar Bags with Food Inside

The best location to keep sealed Mylar bags is in cool, dark and dry locations, such as pantries or cabinets, or inside sealed food-grade storage containers.

The temperature, humidity and exposure to sunlight have a major effect on how long food can remain edible. The conditions must stay stable, so that the food remains safe for the longest time.

Shelf Life of Food Stored in Mylar

Food stored in Mylar storage bags has a long shelf life; how long depends on the type of food you are using and how you are storing it.

Generally, the shelf life of food sealed in Mylar bags is as follows:

• White rice has a shelf life of 20 to 30 years
• Beans have a shelf life of 10 to 25 years
• Flour has a shelf life of 5 to 25 years
• Sugar can last indefinitely if stored dry

The two most critical elements that will increase the life of food stored in Mylar bags are proper sealing and oxygen removal.

Read more in our guide "How Long Food Lasts in Mylar Bags"

Common Mistakes to Avoid

• Leaving out oxygen absorbers if you plan on long-term storage
• Damaged bags or thin bags
• Gap issues with sealing
• Storing bags in very hot locations

Are Mylar Bags Reusable for Food Storage?

Mylar bags can potentially be reused short-term if cleaned well and have no tears or damage, but if you want to store food in Mylar for long term (years), it is best to use new bags as this will provide the best protection for the food and keep it fresh.

For more information about reuse of Mylar bags, be sure to check out our related guide, "Are Mylar Bags Reusable?".

Conclusion on Storing Food With Mylar Bags

To store food in mylar bags, pack the dry foods into the bags, adding the appropriate-size oxygen absorber, seal the bags with heat until they are airtight, and store them under conditions that will protect them from moisture, light, and heat over long periods of time.

By using Mylar bags, you will be in control of your food's freshness, longevity, and overall safety. In addition to having the proper tools and techniques for sealing the Mylar bag properly, understanding how to store your food will help ensure the longevity and quality of your stored food. When used correctly, Mylar bags offer one of the most reliable methods for long-term food storage.