When it comes to long-term food storage, Mylar bags are a favorite among families and companies. They’ve become increasingly popular. But what exactly are Mylar bags, and why are they everywhere nowadays? Let’s answer it!
Mylar is a light-blocking, flexible, and strong polyester film material that is also resistant to oxygen and moisture. That's exactly why it's such an excellent option for long-term food storage.
Whether you're preparing for emergencies or just want to preserve dry foods for months or years, these bags are a time-tested solution.
With increased interest in being self-sufficient and storing bulk food, it's well worth delving into the advantages of Mylar bags, how they function, and how to utilize them properly. In this blog, we’ll discuss it all, so let’s kick-start our journey!
Mylar bags are made from BoPET (biaxially-oriented polyethylene terephthalate). They're super durable and keep air and light out. Due to this, these bags are better than an average plastic bag. They’re commonly used for:
This makes them popular with preppers, small businesses, and even coffee roasters.
Custom mylar bags have an aluminum foil layer. It serves as a protective barrier from oxygen and moisture.
When combined with oxygen absorbers, they drastically slow spoilage. They even outperform plastic containers and Ziploc bags. This is especially useful for items like:
If you’re wondering how long food lasts in Mylar bags, here’s a quick look at the Mylar bag food storage chart:
|
Food Item |
Shelf Life (Years) |
| White Rice | Up to 30 |
|
Dry Beans |
Up to 25 |
|
Oats and Flour |
10 to 15 |
|
Coffee Beans |
3 to 5 (when sealed properly) |
You need oxygen absorbers to get those kinds of results!
Using Mylar bags is easier than you might think. Follow these steps in this regard:
Step 1. Pick your food – Use for dry and low-moisture foods.
Step 2. Choose your bag size – These bags come in different sizes ranging from snack-size small mylar bags to larger ones.
Step 3. Add oxygen absorbers – These are essential for removing air and preventing spoilage.
Step 4. Seal the bag – Use a clothes iron, heat sealer, or hair straightener to heat seal mylar bags.
Step 5. Label everything – Include contents and date.
Many people ask how to seal a Mylar bag; it’s super simple. Once your food and oxygen absorber are inside:
Wondering about the best vacuum sealer for mylar bags? Not all models work well with them. You’ll want a powerful seal function or a wide enough heat bar to handle the thicker material.
Foodsaver mylar bags are popular for smaller portions, but heavy-duty sealers are better for larger bags.
Some foods last forever in Mylar bags. Others? Not so much. Let’s discuss them:
If you’ve ever wondered, “How long will dry goods last in Mylar bags?” The answer really depends on moisture content, oxygen levels, and storage temperature. For best results, keep things dry, dark, and cool.
In short, yes, for long-term storage. Ziploc bags are great for short-term use. Vacuum sealing works well too, but Mylar bags have thicker walls and better light resistance.
Some even combine both in the form of mylar vacuum seal bags to double the preservation power. You can vacuum seal butter, but for best results in the freezer, it’s recommended to use it within 6 to 12 months.
Amazon temporarily banned opaque mylar bags due to concerns they were being used for non-food items (especially in unregulated industries).
Don’t worry though, transparent or labeled mylar bags are still available. Many custom packaging suppliers now offer FDA-approved options that are compliant and food-safe.
Absolutely. They’re affordable, lightweight, and incredibly effective at extending shelf life. Whether you’re prepping for emergencies or running a small food business, they help cut waste, save money, and protect your product.
Plus, they’re reusable. Just trim off the sealed edge and reseal the same bag again.
While mylar isn’t curbside recyclable in most places, you still have options:
Also Read: Butcher Paper Explained: The Best Choice for Food Wrapping & Packaging
Mylar bags are a smart investment in long-term food storage and product safety. If you’re preserving packaging products for resale, they offer unmatched protection.
Custom Designs Boxes offers high-quality, food-safe, and fully customizable mylar bags to suit every need. With our expert packaging team by your side, you’ll never have to worry about shelf life, spoilage, or style.
Ready to upgrade your packaging game? Get in touch with us today via email at sales@customdesignsboxes.com and let’s create something that lasts!
1. What is the point of Mylar bags?
They block light, moisture, and oxygen. This makes them ideal for preserving food long-term.
2. How long will coffee beans last in Mylar bags?
Usually, it takes 3 to 5 years for oxygen absorbers to be in a cool, dark place.
3. What should you not store in Mylar bags?
Avoid moist, oily, or fresh items. Stick to dry goods only.
4. Are Mylar bags better than Ziploc bags?
Yes. Mylar bags offer better durability and protection for long-term use.
5. How do Mylar bags work?
They form a sealed barrier against air and light. Add oxygen absorbers to maximize shelf life.
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