Why And How Should You Use Mylar Bags For Food Storage?

Written by Robin Brown on July 29, 2022
Mylar bags are popular for food storage. Most foods can be stored safely in Mylar bags, although some are better suited to long-term storage than others. Different types of food require different thickness types and storing conditions for longevity.
Mylar bags are thin, flexible foil bags made of impermeable material that keep food inside safe from external elements, especially oxygen. They resemble a flexible, portable tin that can adjust to the amount and quantity of food.
Making your own bulk goods and storing them for emergency usage is an excellent method to save money. Bulk foods can be found in large warehouse stores for very low prices (like Costco). The money you save by buying in bulk will go a long way toward giving you peace of mind. You may have enough left over to purchase other emergency preparedness products to keep you and your family safe and secure. Make your own food storage!
What do you reach for when you need to keep perishable foods? Is it a standard Ziploc bag on the top shelf? Or perhaps a resealable container? Even if some of those products are useful for keeping food, be sure they can also help your items survive as long as feasible. As a result, you might wish to look into mylar bags.

In this article we will learn about how and why mylar bags are used to store food.

What is Mylar?

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You might be wondering what mylar bags are. These fantastic bags use vacuum sealing technology to help you store all of your perishable products for a long time. If this sounds like something you'd be interested in, stay reading to discover more!
People often mistake Mylar for metal, although the metallic appearance is due to a slight coating of aluminum sandwiched between polyester layers. The layers of the Mylar bag make it an oxygen-tight barrier.

The bag is made of stretched polyethene and is famous for its durability, flexibility, and long-term storage capability.
Since Mylar has been available since the 1950s, it has a wide range of applications in various industries. This applies to the transportation, electricity, and even space industries!

Mylar has been used to protect maps, as thermal and electrical insulation, as a material in solar panels, as diaphragms in headphones and loudspeakers, in components of spacesuits, and even as confetti! It may now add "vacuum-sealed bags" to its list of achievements.

The benefits of using mylar bags for food storage

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The following are some of the benefits of using Mylar pouches:
It shields you from light, wetness, and insects.
They can remove oxygen and build an effective oxygen barrier
bacteria-free food preservation Using a Mylar bag protects your food from bug invasion while preventing bacteria growth due to the lack of oxygen.
Increasing the food's shelf life.
They are re-usable
The number one reason we all desire a Mylar bag for long-term food storage is for effective and efficient food storage. Preserving food for the future is a fantastic investment with so much to do. Here is where Mylar pouches come in: they're robust, efficient, and effective.
Another important reason for using Mylar bags in food storage is the absence of oxygen in the preservation method, which makes it easier for foods to stay fresh and without decay. Finally, protection from insects, moisture, and light, which would make preservation impossible, is another significant benefit of using Mylar pouches.
Mylar bags are opaque and made of metalized polyester. Oxygen absorbers (also known as oxygen scavengers) are put into Mylar bags to remove the air.
Mylar is chemically stable. As a result, it has a wide range of applications. Mylar bags are packing bags produced from mylar films, such as retort pouches and vacuum bags. Mylar bags extend the time that food can be stored. Still, they are far less expensive than a professional food storage facility.
Mylar bags are also significantly harder and more resistant to gas leakage than vacuum sealer bags due to their metalized composition. Mylar bags, like aluminum cans, protect against gas permeability as well as light, heat, bugs, and damage from impacts and environmental conditions. You are better positioned to have an extended duration and even more when the meal is well sealed.
Also, BPA is never utilized in the production of roll sheet plastic, and Mylar only uses virgin plastics. BPA is mainly applied in shaped-type product manufacturing techniques such as blown and hot die form.
Bisphenol-free A concern is still fresh in our memories, which is understandable. The chemical has been linked to a variety of health problems, including cancer and reproductive disorders, in numerous studies. Those investigations, however, have focused on BPA in plastic bottles and sippy cups. Some metal cans and other containers, although not all, contain the same chemical.
Since mylar bags do not contain BPA, consumers could be confident that they are safe for food storage. Mylar bags are lined with a food-grade material called polyethylene instead of BPA (PE). PE has been used in food packaging since the 1940s, and the US Food and Drug Administration considers it safe for direct contact with foods (FDA).

How to store food in mylar bags

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Food can keep for decades in Mylar pouches. However, this is mostly dependent on three key factors:
Condition of storage
Food category
If the food was appropriately sealed.
When using Mylar bags for food storage, these three essential criteria will influence the time and lifespan. The shelf life of most foods, such as canned goods, is expected to be 10 years, although well-dried commodities like beans and grains can last 20-30 years.
Food storage necessitates ideal conditions as well as ample, secure storage space.
It's important to know what's inside each Mylar bag or bucket without opening it. You'll also need to know the exact date the bag or bucket was sealed.

A sharpie pen is the most convenient way to do this. Sharpie markers are easy to use on mylar bags. If you don't let them dry, they may smear.
First, select an excellent, dry spot with lots of space, as you may need to store thousands of pounds of food, depending on how many people live in your home and how long the food store needs to survive. Temperature, light, and insect levels are all factors to consider when choosing a storage place.


Food should not be kept in the basement or garage. The temperature in these areas varies dramatically throughout the year. Temperature fluctuations can be harmful to food. The heat that exceeds the ideal temperature range of 40 to 60 degrees Fahrenheit can drastically reduce shelf life. Every 10.8 degrees above this optimal temperature range reduces the shelf life by half. Locate a temperature-controlled room in your house.


Food should be kept in opaque containers in a dark environment. Light can stimulate chemical reactions in food, lowering its nutritional content. It will still be edible, but it will be devoid of the vitamins and minerals that it would contain in the dark. Proteins and vitamins A, E, and D are the most prone to breakdown when exposed to light. These nutrients are necessary for good health. Nutrients can be lost when food is stored incorrectly.


On the other hand, Rats may chew through mylar sacks, enabling light to get through. Although mylar packaging protects food from pests, you should still store it in a pest-free environment. Keep them off the floor to further dissuade pests from entering buckets with food. When oxygen absorbers are utilized, insects are prevented from eating food eggs that naturally arise in the containers. Grains pose a particular issue for insect eggs. The bugs are killed by the lack of oxygen before they can infect your meal. With airtight and moisture-proof packaging, you can keep your meals fresh for as long as possible. Moisture can deteriorate food quality and make it unhealthy in some situations. When food is kept off the floor, it prevents moisture from humidity or flooding from reaching the storage containers. Because moisture shortens the shelf life of foods, those with less than 10% moisture have the most extended shelf life.

Reusability of mylar bags

The re-usable aspect of Mylar pouches is an extra benefit, which makes it ideal for cost-effective benefits as well as long-term usage possibilities.
You can easily cut your Mylar pouches into smaller sizes and make more bags out of them and be re-usable. If you want to get the most out of the mylar pouches, make sure they're thoroughly cleaned after the first use, and then always seal at the top, so you don't have to cut more away when it's time to use them again.
Are FoodSaver bags better than Mylar?
Unfortunately, FoodSaver bags are not the greatest option in extreme long-term storage conditions. Mylar bags are definitely the preferable option if you need to store food for more than a year. FoodSaver bags may leak over time, allowing air to enter. On the other hand, Mylar bags leak less and are opaque, blocking light effectively.
You may sometimes use Mylar bags as liners to store food inside a 5 or 6-gallon "food grade" plastic bucket for additional security and protection (especially if you're worried about rats) and simpler handling. The product is placed in the Mylar bag, sealed, and the bucket is covered with a tight-fitting lid.

Mylar bag has different sizes and features

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There are different features available with mylar bags:
Bags with holes.
Bags with simple openings
Zip-lock plastic bags
Bags with a vacuum seal
Food does not come in standard sizes, and neither should your packaging. That's why mylar bags exist in a variety of sizes to meet your specific requirements. There's a bag for everything, whether it's liquid-based or fruits and vegetables.
These dimensions also make it easier to preserve your food and reduce the amount of space available for air to enter the bag's interior. To extend the life of your food, make sure to package it in the proper container.
There are three sizes available: 20 x 30 cm, 25 x 35 cm, and 35 x 50 cm.
For food storage, we recommend two sizes of Mylar bag:
The one-gallon size (about 10" x 14") is ideal for storing small quantities of grains, spices, salts, flour, sugar, and other baking ingredients.
Beans, pasta, noodles, corn, and rice can all be stored in the five-gallon capacity (which is about 20" x 30").
Although several sizes are available, the 1-gallon and 5-gallon sizes are the most popular.

When purchasing Mylar bags for food storage, a minimum thickness of 4 mil is recommended. Although the thicker the bag, the better, 4-5 mil bags will suffice. Likewise, these bags are available in a variety of thicknesses. Mylar bags come in two thicknesses: 3.5 to 4.5 mil and 4.5 to 6.5 mil. Because the former is thinner, it can't hold your meal for as long as the thicker varieties. Still, both bags will do an excellent job protecting your perishable foods. Use the 3.5 to 4.5 mil for food that will be eaten soon and the 4.5 to 6.5 mil for food that will be stored for an extended period.
Consider these options when utilizing Mylar bags:
1. Use an oxygen absorber that is appropriate for the size of the Mylar bag being used:
Oxygen absorbers with a capacity of 2000cc are ideal for 5-gallon Mylar bags.
Best for 1-gallon Mylar bags are 300cc oxygen absorbers.
Oxygen absorbers could eliminate up to 99.99 per cent of oxygen from Mylar bags. When compared to vacuum sealers, which remove 99.5 per cent of oxygen, oxygen absorbers are 50 times more effective. Because oxygen absorbers in Mylar bags only remove oxygen and not nitrogen or other gases, the volume of gas in the pack is only cut in half. The presence of nitrogen and other gases in the sealed bag will prevent germs from multiplying because they can only live in aerobic (oxygen-rich) settings. Fill the bag only halfway. (Oxygen absorbers will accomplish their job of removing oxygen from the void, leaving just nitrogen.)

2. Before sealing, wipe any residue from the inner and outer edges (especially when storing things like flour or other powdery substances).

3. Only the top of the bag should be sealed (about an inch). This will give you enough room to re-seal the bag if you ever need to cut it open to extract the product (and always replace the oxygen absorber before doing so!). If you're using the Mylar bag to line a food-grade bucket, you can fold the seal down and tuck it inside the bucket for safe storage.

4. In a few days, check the seal. The bag should be compacted in appearance. If it still isn't compressed after a few days, you'll have to cut it open and start over.

5. If at all feasible, keep your food storage below 70 degrees (or even cooler for longer storage shelf life). All food storage products are damaged by heat.


And that closes the discussion.
If this is all new to you, you'll be pleased with how simple it is to use Mylar bags. Mylar bags, oxygen absorbers, 5-gallon buckets, the food you wish to store, and part of your time are all things you'll need. You'll have no trouble preserving your food and keeping it fresh for a long time now that you know how to use mylar bags for food storage. The next task is to decide where you can purchase mylar bags so you can begin storing food. We've already taken care of that for you!
We know all about high quality bags Pkgmaker produce. Mylar bags are available, but we also have drawstring bags, totes, re-usable shopping bags, and much more.
Take a look around our website to see what we have to offer, or contact us if you have any questions about our products or services. Whatever you require, Pkgmaker is here to help!
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Article written by Carl Phillips

Carl Phillips is part of the content team at Pkgmaker where he develops resources to help customers start and grow their own businesses.

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