Many often ask "Can you store nut in mylar bags?" Yes, nuts can be stored in Mylar bags. Mylar provides a strong barrier against oxygen, moisture, and light, which helps prevent the natural oils in nuts from going rancid. When sealed properly, especially with an oxygen absorber, Mylar bags can keep nuts fresh for up to 1–2 years depending on the type.

Nuts are considered to be easy to keep fresh, but they can also become stale very quickly. Nuts such as almond nuts lose their crunch; cashew nuts absorb odors; and walnut nuts are sour at times! Most of the time since these nuts have been exposed to moisture and light, they spoil. Many people consider using Mylar Bags as an alternative method of storing their nuts.

Below is a deeper look at why they work so well and how to store nuts correctly.

The Quick Spoiling of Nuts

Nuts naturally contain oil, a healthful substance that is also particularly vulnerable to air and heat. When the oils in nuts come into contact with oxygen they oxidize, which slowly creates rancid oils.

There are three primary causes for nut spoilage:

1. Oxygen - oxidizes the natural oil in nuts
2. Moisture - encourages the growth of mold
3. Heat and light - are both responsible for speeding up the spoilage process

Even if nuts are stored in jars or plastic containers they can begin losing quality within a few months.

That's why the type of package used to store nuts matters, a package designed to block air and moisture from reaching the oily nature of nuts can make a true difference. If you’re curious about the material itself, see what Mylar bags are made of.

How Mylar Bags Work for Storing Nuts

Mylar bags are made from layers of polyester film and provide a barrier to oxygen, light, and moisture, which makes them an excellent packaging solution for long-term food storage. The use of the Mylar bags can significantly extend the freshness and flavor of a product far longer than traditional packaging and some of the key advantages include the following:

Excellent Oxygen Barrier
The use of Mylar bags will dramatically reduce the amount of oxygen that will reach food.

Moisture Protection
Mylar is so thick that humid air cannot pass through it readily.

Light Blocking
Mylar bags can block up to 95% of harmful ultraviolet light that can cause oils to degrade in nuts.

Strong Sealability
The use of heat sealing will create an airtight seal.

All these properties are very useful when storing almonds, peanuts, cashews, pistachios, and walnuts. Learn more about how Mylar bags work.

Length of Time Nuts will Stay Fresh Inside Mylar Bags

The shelf life of nuts will vary depending on type and the way they are stored; however, using Mylar bags to package nuts will greatly extend the freshness of the nuts.

The approximate shelf life of the types of nuts is as follows:

• Almonds: 1-2 years when they are sealed with an oxygen absorber.
• Cashews: Approximately 1 year when they are stored in a cool location.
• Peanuts: 1-2 years.
• Walnuts and pecans: Approximately 12 months (because of the high-fat content).

If nuts are vacuum sealed or if they are sealed with an oxygen absorber, then the nuts will have a longer shelf life.

Storing Mylar bags of nuts in a cool, dark location will also increase the shelf life of the nuts.

Because of their strong barrier properties, Mylar bags are widely used for long term food storage. If you want to understand the broader benefits of this packaging, you can read more about are Mylar bags good for food storage and why they are commonly used for dry foods like nuts, rice, and grains.

Proper Storage of Nuts with Mylar Bags

If you want to get the longest shelf life for your nuts, then the way you package them is really important. Simply putting your nuts into a bag and sealing it does help them keep their freshness, but doing a few additional things will be of great help in extending the shelf life of the nuts.

Steps To Properly Store Nuts In Mylar Bags

1) Start with nuts that are fresh and dry.
Old nuts will not keep fresh by using a better type of packaging.

2) Fill the Mylar bag.
You should leave 1 inch of space at the top of the Mylar bag.

3) Add an oxygen absorber (recommended but not required).
This will remove any remaining oxygen in the Mylar bag.

4) Heat seal the Mylar bag.
You can heat seal the Mylar bags using a heat sealer or flat iron.

5) Store in a cool and dark place.
Store your Mylar bags in a pantry or a food storage container.

The above steps are commonly used when packaging food for long-term storage or bulk storage.

Bag thickness also matters for durability and protection. Here’s a guide on how thick Mylar bags should be for food storage.

Can I Use A Resealable Mylar Bag?

Yes. Many people will find that a standup pouch style Mylar bag with a zip closure provide immediate benefits.

Resealable bags are a truly great packaging choice for:

• snacks
• nut products for retail
• portion control
• medium to long term storage

Heat sealing above the zipper offers the most protection for long-term storage.

Why Many Snack Brands Use Custom Resealable Mylar Bags

Most commercially packaged snacks use mylar barrier films.

This is primarily the result of oxidation sensitivity in nuts. Barrier style custom mylar packaging provides nuts with a way to maintain their flavor, crunchy texture, and shelf stability.

Custom resealable Mylar bags are frequently used in:

1. trail mix
2. flavored almonds
3. roasted peanuts
4. candy nuts
5. dried fruit and nuts

Custom resealable mylar bags keep the product safe during shipping/transport as well as while being sold at retail.

For more information, view our custom resealable mylar bag collection.

Choosing the Correct Mylar Bag

Look for these qualities when choosing bags for nuts:

1. Materials that are 5 mil or more in thickness
2. An inner layer that is food safe
3. Heat sealable
4. Resealable zippers (optional)
5. Light blocking

Stand up pouches are popular because they are functional and easy to store/display.

If you are going to package your nuts for resale or branding, there are companies offering customizable Mylar bags with printed art, nutrition facts, and resealable zippers.

For reliable packaging products, Brandmydispo specializes in making custom resealable Mylar bags specifically for food items such as snacks, nuts, coffee, and gummies.

Final Thoughts

Nuts can absolutely be stored in Mylar bags, and many times they are the best way to maintain their freshness. Mylar bags provide an excellent barrier against oxygen, moisture, and light, which preserve the nut's flavor, texture, and nutritional value.

If blended appropriately, storing nuts in Mylar bags, when done properly and stored in a cold environment, allows for nuts to remain fresh longer than if they were to be stored in traditional containers. Whether you are storing food at home or packaging snacks for a brand, Mylar bags are a highly effective and dependable packaging solution.