What Is A Mylar Bag: The Ultimate Guide To Long-Term Storage Packaging

Every brand looks for the best packaging that keeps its products fresh and protected for a long time. Mylar bags do that and so much more. It protects food and other items from light, oxygen, and moisture. This way, your products can survive for more than 25-30 years at most.

More so, it is preferred by several industries because of how trustworthy and satisfactory it is for the customers. There is so much more you should learn about mylar bags, such as their function, barriers, usage, and more. Read the blog to begin.

What Is A Mylar Bag?

Consumers often get confused by the term “Mylar.” It is a clear material, made from polyester resin. A Mylar bag is a durable flexible packaging solution for preserving your valuables. It is designed with two inner layers: aluminum and protective polymer. The specialized layers are heated and stretched, which makes them airtight and resistant to punctures.

Preppers, medical companies, and collectors use them for long-lasting storage, to protect sensitive vitamins and capsules, and to hold dehydrated or freeze-dried foods. Industries even customize them in their own unique design, sizes, shapes, styles, and security features.

History Of Mylar Bags

How did Mylar bags come to be? The scientists DuPont and Hoechst developed BoPET in the early 1950s, with the help of ICI. They made this material for industrial and electrical insulation purposes. [Credit: History of Mylar]

Mylar became a trademark of biaxially-oriented polyester film, which is recognized worldwide. Later on in the 1960s, NASA heavily depended on Mylar for space blankets and food packages. From there, it was mainly used for storage purposes.

What Are Mylar Bags Made Of?

In simple words, it is made of a specialized polyester film (also called BoPET). The material is flexible, strong, and resistant to tearing. It is combined with other materials, such as aluminum foil, gold, and polyethylene.

This means customers don’t need to worry about moisture, gas, chemicals, or heat leaking into the bag. Not only that, it hugs the contents of the bag and leaves no room for oxygen to break in and spoil the product.

Different Layer Protection Of Mylar Bags

Mylar bags are built with multiple 3-layer laminated films. They provide maximum durability, puncture resistance, and hermetic sealing and protection from UV light, odor, moisture, and oxygen.

Moreover, these layers are customizable, meaning you can get them in 3.5 to 10+ Mil thickness. For high-end manufacturing companies, a 7.5 Mil Mylar bag. It can resist punctures and rely on these three material layers:

• Outer PET Layer: The core layer is made of Biaxially-oriented Polyethylene Terephthalate (BOPET) plastic. It is structurally strong, tolerant to high temperatures (260 °C), and offers excellent printability.
• Middle Foil Layer: Brands can preserve the products for a long time with a middle aluminum foil (barrier to moisture and gas (WVTR and OTR near 0)) or MET PET (barrier properties and flexibility at a lower cost) barrier layer. No oxygen, moisture, light, or aroma leaves the bag.
• Inner PE Layer: This layer is mainly made from food-safe polyethylene (PE) and is called the inner sealant layer. Also, when you heat-seal the bag, it becomes airtight.

Key Features Of Mylar Bags

The multi-layer barrier design differentiates Mylar sacks from ordinary plastic bags. If you want to learn what other distinctions there are, read this:

Metallization

Mylar bags go through a process where they are metallized with aluminum. This shiny layer acts as a high-barrier shield as well. It protects the food products from spoilage, light, heat, and air.

Long-Lasting Bulk Storage

Businesses can store a large amount of produce within these bags for decades. It comes in handy for emergency situations or prepping. In addition to that, families can have a stable shelf of white rice, wheat, beans, pasta, oats, and sugar.

Heat Sealable

You know, these bags can seal shut with heat, which in turn secures the food products from contamination and leakage. How does this happen? They are layered with plastic and aluminum foil that you can melt to create an airtight space.

Puncture Resistant

Mylar is not like plastic, as it can resist punctures and tearing with ease. You can store heavy-duty supplies, collectibles, and prepping gear. The puncture feature relies on the bag’s thickness (7 mil, 5 mil, 3 mil, and so on).

High-Protective Barriers

Oxygen Barrier

Mylar bags bring down the OTR (Oxygen Transmission Rate) values to 0.01cc/100 in²/24 hours. This keeps food fresh for decades and prevents oxidation damage.

Light Barrier

It stops UV rays from affecting the quality of the food within the bag. It is highly reflective and opaque, and provides 99% light reflection.

Moisture Barrier

Moisture can create mold that eats food, like flour, sugars, and more. So, these bags are layered with thick foil linings that control MVTR (Moisture Vapor Transmission Rate) and preserve food products.

Popularity Of Mylar Bags In The Market

There is a reason why so many industries turn towards Mylar bags. At a global scale, these bags are worth to be marketed at USD 4.8 Billion in 2026 and predicted to achieve USD 8.6 Billion by 2035 (As per MarkWideResearch Report). Brands use them for food preservation, emergency prep, retail packaging, and other purposes. They have proven a 6.7% increase in sales during disastrous situations or as emergency supplies.

Mylar bags are very easy to store, are lightweight, and are tear-resistant. Meaning they are a reliable choice for shipping and everyday handling. More than that, they are long-term savers for brands and a cost-effective solution with a CAGR of 7.8%.

How To Choose The Right Thickness Of Mylar Pouches

Mylar bags' thickness is usually measured in mils. If you can’t decide how thick the pouches should be for various items, then look at the following thickness guide. You can use 2.0 to 3.5 mil for basic protection from moisture and contamination. Moreover, a 3.5 to 5.0 mil offers good flexibility and durability.

5.0 to 7.0 mil thickness is perfect for heavy-duty protection that can resist tears and punctures. Also, mylar bags with 7.0 to 10.0+ mil thickness can withstand difficult environmental changes.

What Can You Store In Mylar Bags?

Industries and people mostly use Mylar bags to store different food items for long-term preservation. You can read through them in the following table and also learn about their shelf life:

Preppers can utilize the Mylar bags as survival and emergency gear. It can hold fire-starting kits, survival tools, and medical items. Not only that, but to ensure your valuable documents, electronics, and hardware remain safe, these pouches are the best choice.

What Types Of Mylar Bags Should You Know?

Businesses can rely on this list and choose what kind of bags they want. Also, different styles can help them decide the best functional one for their products:

Types of Bags

• Child-resistant bags
• Lay Flat Mylar bags
• Ziplock bags
• Vacuum-Sealed bags
• Heat-Sealed bags
• Gusseted Mylar bags
• Stand-up bags
• Custom-shaped bags
• Holographic bags
• Metallic design bags
• Clear Window bags

Who Uses Mylar Bag Packaging?

You’ll be surprised to know how many industries and places use Mylar bags. The following are the ones that utilize these pouches the most:

Food & Beverage Brands

Food quality breaks down fast because of external factors, such as light, heat, moisture, and more. That is why, to give the food a longer preservation time, Mylar bags are used. Brands benefit from their strong barrier that slows down oxidation and keeps the freshness and crunch alive. Popular food items that are packed in Mylar pouches are:

• Pet food
• Dry fruits
• Spices
• Coffee
• Powdered mixes

Emergency Preparedness & Preppers

Survivalists and everyday households rely on these Mylar bags for long-term storage units. Food can last years (basically up to 25 years or so), in them, not weeks. They block oxygen and humidity, especially when they are combined with oxygen absorbers. These are food items they can store:

• Rice
• Dried beans
• Grains
• Freeze-dried meals

Pharmaceutical Companies

Medicine needs special protection from dust and humidity, as it can lose its effectiveness. That is where Mylar packets and their multiple layers provide the right stability. The following medicines stay safe and effective until their expiry dates:

• Cannabis
• Capsules
• Powdered medicines
• Sensitive vitamins
• Capsules

Cannabis & CBD Dispensaries

If you keep these items in different packets or boxes, there is a chance their aroma will leak out. They are highly sensitive to air and light, so with Mylar bags, you can lock in their freshness with ease. The given list includes items commonly used in these pouches:

• Dried Cannabis Buds
• Edibles (chocolates, gummies, candies)
• Vapes & Cartridges
• Infused oils
• Sugar
• Medicinal Capsule

Cosmetic Industries

Makeup is made of certain components that can be contaminated if not stored securely. Brands can protect them with these pouches and maintain the texture, color, and effect. Look at these items you can pack:

• Cleansers
• Powdered masks
• Eyeshadow kits
• Herbal blends
• Powders

General Storage

People might think that their papers or electronics need a lot of protection. But no, documents can get yellow and electronics can corrode. You can protect these items from aging:

• Documents
• Comics
• Paper photos
• DVD
• Cables & Charges

These are the most common industries that utilize Mylar bags to their advantage. However, other hardware, industrial, and manufacturing companies can use these pouches for various storage or transport purposes as well.

Why Do Businesses Choose Mylar Bags Vs Rigid Packaging Boxes?

The right packaging affects the shipping cost, product protection, and shelf life. So, between Mylar bags and packaging boxes, which one is better? Mylar bags are multi-layer, designed to preserve the product’s freshness for a long period of time. Whereas, packaging cartons are constructed for protection and for creating a premium unboxing experience.

The real choice does come down to Mylar bags or rigid boxes. It is what can likely damage your product. If environmental threats such as oxidation, moisture absorption, and UV-induced rancidity are the issue, go for Mylar. But, if you worry that the product will crush, bend, and break during transit, the clear option is rigid, structural boxes.

Factors To Consider Before Buying Mylar Bags

You’ll be wasting your money if you don’t stop to consider the following factors. Be sure to look for something that can protect the food, products, or your gear the way you want.

• Thickness: A 3-4 mil bag is fine for lightweight items. Whereas a 7-10+ mil thick pouch is best suited for industrial goods. So choose wisely. The thickness directly shows how durable it actually is.
• Oxygen Absorbers: Premium bags feature an OTR near zero. Therefore, to make an effective Mylar bag, you must pair it with the correct size of oxygen absorber packets. It can range from 100cc for small pouches to 2000cc for 5-gallon buckets.
• Number of Layers: A 3-layer bag comes in handy for basic storage purposes. Outer Layer (PET / BOPP), core barrier (AL foil / VMPET), and inner sealant layer (LLDPE / PE) layers are barrier protectors, durable, and offer efficient storage.
• Buying Options: You should choose retail purchases if you want a smaller quantity of bags. As for bulk orders, try wholesalers. They even give you discounts, and the quality remains the same.
• FDA-Compliant: Before anything else, check if the bag material is food grade. It should follow FDA regulations (FDA 21 CFR compliance), or else it can release harmful chemicals into the food.
• Review Certificates & Reviews: Brands should thoroughly review the material certifications. As well as verified customer reviews to ensure you’re getting a legit deal.

What Are The Various Sizes Of Mylar Bags?

Brands should stop and consider the sizes they should get their Mylar bags in. The size, their thickness, and other factors matter for different types of applications. Here’s a run-through of the standard sizes:

You don’t need to worry if you couldn’t find the desired bag size. At PouchLabels, we offer our customers any size they desire. Along with that, you can even personalize them in different designs, colors, prints, and more.

Are Mylar Bags Customizable?

These bags being personalizable is the biggest reason many companies prefer them over standard packaging. You can print pouches with your own customized logos, product information, color theme, and barcodes. Not only that, LabelPouches give you shape and size options to ensure a better fit and less waste.

You can give Mylar bags a premium outlook with different finishes, such as gloss, matte, metallic, and spot varnish. Make the bag highly functional by including resealable zippers, child locks, heat seal, and other features. Best of all, protect different products against moisture, oxygen, and light with custom thickness and a reliable material structure.

Get the Best, Secure, and Personalized Mylar Bags at LabelPouches

If you want the best services that let you customize Mylar packets in any shape and form, then turn your attention to LabelPouches. We provide all the desired features you need to make your Mylar vision a reality. Wholesale pricing, better turnover, customizations, printing Options, security features. You name it, we have it.

Without waiting any longer, give us a call today. We’ll hook you up with an instant quote. You can select, consult, review, and create your high-quality Mylar bag in seconds!

Frequently Asked Questions About Mylar Bags

What are the common materials used to make Mylar bags?

These pouches are made from BoPET with various laminated layers, such as aluminum, PET, metallized PET, and nylon.

What cannot be stored in Mylar bags?

High-fat foods, cheese, fresh meat, and cooked food should not be stored in Mylar bags. It is because anything with moisture, active chemicals, and fat content doesn’t stay stable in such bags.

How do you know if oxygen absorbers are working fine in Mylar bags?

To check that, you can actually feel the Mylar pouch getting rock solid upon sealing. If it’s not firm, then there is a functional defect. Or it failed due to a dead absorber or a failed seal.

What is making Mylar shiny?

It is because of the transparent PET layer. Also, the bag has a very thin layer of aluminum foil that makes it reflective and shiny.

Are custom Mylar bags better than standard sizes?

Yes, in most cases, custom sizes are preferable, as they reduce wasted space, improve product presentation, and increase shelf life. Businesses can use standard sizes in cases where they want to store a normal amount of single food items.

Are Mylar bags waterproof?

They are made from an aluminum layer, which acts as a barrier and makes them resistant to water vapor. Thus, they are great protection against water and liquid spills.

Do Mylar bags have aluminum foil?

Mylar does have layers of aluminum foil as one of its multiple layers. It is laminated with it and protects products from light, oxygen, and moisture.

Do Mylar bags support vacuum sealing?

Yes, but there’s a catch. Mylar bags need an internal chamber vacuum sealer or a nozzle sealer instead of an external suction sealer to properly remove all the air.

Are Mylar bags smell proof?

Of course. These bags keep the smell of the product inside the bag and don’t let it get mixed with unwanted odors.

Final Thoughts

Mylar bags are the best storage solution with a wide range of security properties, functional characteristics, and customizations. They help consumers and brands worldwide. You can preserve food, documents, electronics, and more for a long-time with its impressive barrier protections.

Not only that, but brands can personalize them with their own design, print, size, shape, thickness, and more. All of this is achievable with LabelPouches! We offer every feature necessary for creating a quality Mylar bag. So don’t wait any longer and contact us via email, phone, or live chat to get an instant quote.