If you’re wondering whether you can store oatmeal in Mylar bags, how long it will last, and the right way to store it, here’s what you need to know.

Oatmeal can be safely stored in Mylar bags and it’s one of the best methods for long-term food storage. When you add oxygen absorbers and seal the bag properly, oatmeal can last anywhere from 10 up to 30 years or more, especially if stored in a cool, dark, and dry environment. To do it correctly, fill the Mylar bag with dry oats, insert the appropriate oxygen absorber, seal it tightly with heat, and keep it in a stable, low-temperature area.

Oatmeal doesn't have a loud expiration; instead, it fades away silently over time. The oils will become rancid, flavor will fade, and texture will be lost. One day, it may simply be breakfast, but the next day it may just be an inedible pile of dust.

So the question isn't whether or not you can store oatmeal for a long period of time, but rather how do you properly store it so that you don't ruin it?

Oatmeal doesn't just go into mylar bags for storing - mylar bags, when used correctly, freeze the food. Almost.

Short Overview

Can you store oatmeal in Mylar bags?

Yes, you can store oatmeal in Mylar bags are one of the best ways to store oatmeal long-term because they block light and, when paired with oxygen absorbers, prevent spoilage.

How long can you store oatmeal in Mylar bags?

Oatmeal can last 10 to 30+ years in mylar bags depending on the type and storage conditions. Rolled and steel-cut oats last the longest when sealed with oxygen absorbers and kept in a cool, dry place.

How to store oatmeal in Mylar bags?

To store oatmeal in mylar bags, place dry oats into a Mylar bag, add the correct size oxygen absorber, heat seal the bag tightly, and store it in a cool, dark, and dry area.

How Long Can You Store Oatmeal in Mylar Bags

Short answer: A long time; probably longer than most people think.

Rolled oats (w/oxygen absorbers): 20-30 years
Quick oats: 10-20 years
Steel cut oats: 25-30 years+

This isn't a typo. When oxygen is removed from mylar bags, and the bags are stored in a cool, dry place, oats become an incredibly dependable longterm food supply.

Where do most people go wrong?

Oatmeal contains fat, and even though it is only a small amount of fat, eventually if oxygen comes in, it will go rancid. So if you just dump oats in a bag and seal it without removing oxygen, you are not preserving them; you are only delaying disappointment.

Storage life is chemistry, not magic.

If you’re unsure whether they’re necessary or how they work, check out our full guide on Do You Need To Use Oxygen Absorbers in Mylar Bags.

What Affects Oatmeal's Shelf Life?

Not all storage methods are created equally; a few little mistakes could cut decades of storage down to only a few years.

1. Oxygen exposure

Oxygen = oxidation = rancidity; even though it is an invisible enemy, it is still very aggressive.

2. Temperature

Heat accelerates breakdown.A closet kept at 65°F is a superior place to store your food than a garage kept at 95°F.

3. Light

Food quality deteriorates when exposed to light, including UV light. Using Mylar does a great job of blocking out UV radiation and is one reason why Mylar works well for food storage.

4. Moisture

Some humidity (even a little bit) can ruin an entire batch of food. Today’s moisture creates clumping, while tomorrow’s will lead to mold.

5. Bag thickness

Poor quality, thinner bags will slowly leak air over time. You can go with a heavier gauge mylar bag in order to provide better protection against premature breakdown.

Although perfection isn't required, control is important.

How to Store Oats in Mylar Packaging (Step by Step)

This is where things go wrong or right.

Step 1 – Selecting the Right Oats

Select only plain dried oats. No flavoring or added sugar/oil. Only plain oats.

Step 2 – Selecting Quality Mylar Bags

Heavier bags provide the best protection. Inexpensive bags will permit oxygen to enter over time and defeat the purpose of storing items in Mylar.

Step 3 – Adding Oxygen Absorbers

Without oxygen absorbers, your oats will last possibly a couple of years; with them, a person has decades of possible usage.

The role of oxygen absorbers is to

• Remove oxygen from the bag
• Prevent rancidity (decomposing food)
• Control insect eggs present in the oats.

No oxygen, no life. No life, no decay, no surprises.

If you’re new to long-term storage, you might also want to read Why Use Mylar Bags? to understand what makes them so effective.

Common Problems Destroying Oats

You can do 90% of the right things, but one small mistake will usually ruin your stored oats. Common reasons for the failure of stored oats include:

1.) Sealing bags without oxygen absorbers
2.) Using flavored oats OR instant oats
3.) Storing the oats in extreme heat (i.e., garage or attic).
4.) Incomplete sealing of the bag. Tiny leaks matter.
5.) Using poorer quality thinner plastic bags.

Oat storage failures usually are not obvious....they tend to be gradual; for example, it can leak slowly over time until suddenly the person sees that the product is “off” when they store the oats.

Why Mylar Packaging is Excellent for Keeping Oats Fresh

Mylar food storage products are used by preppers and professional food storage vendors because Mylar bags:

• Completely block out all light
• Create an oxygen barrier
• Are compatible with oxygen absorbers
• Are flexible and take less space for storage
• Are stable long term if sealed correctly.

Compared to using either plastic containers or Ziploc bags, the difference in protection provided by Mylar is significant.

Why Custom Food Mylar Bags Make Sense for Oatmeal Brands

In Conclusion

You can store oatmeal in Mylar bags, and it’s actually one of the most effective ways to preserve it long term. When sealed with oxygen absorbers and kept in a cool, dark, dry place, oatmeal can last anywhere from 10 to 30+ years depending on the type. To store it properly, place dry oats into a Mylar bag, add an oxygen absorber, heat seal the bag completely, and store it away from heat, light, and moisture.

Oats are very economical, healthy, and will keep for long periods of time. If a person uses Mylar for storage with oxygen absorbers, they provide a long-term supply of usable food for possibly decades after their initial packaging. This is "smart planning", not "overdoing" it.

Pack it once; pack it correctly; then you can forget it.

Until you need it.