Mylar Bags Wholesale

Food Storage in Mylar Bags


Mylar bags have emerged as a popular choice for food storage due to their exceptional properties and versatility. In this section, we will explore what Mylar bags are and why they are widely used for food storage purposes.

What are Mylar Bags?

Mylar bags, also known as BoPET (biaxially-oriented polyethylene terephthalate) bags, are made from a durable polyester film that offers excellent barrier properties. These bags are typically metallized with aluminum to enhance their barrier capabilities, making them impermeable to moisture, oxygen, light, and odors. Mylar bags come in various sizes and thicknesses to accommodate different storage needs and can be sealed using heat or ziplock closures to ensure airtightness.

Why Use Mylar Bags for Food Storage?

  1. Preservation of Freshness: Mylar bags create a protective barrier that seals in freshness and flavor, preventing exposure to air, moisture, and other contaminants that can cause food spoilage. This makes them ideal for storing perishable items such as grains, nuts, dried fruits, and dehydrated foods.

  2. Extended Shelf Life: The barrier properties of Mylar bags help prolong the shelf life of packaged foods by preventing oxidation and degradation. By minimizing exposure to external factors that can accelerate deterioration, Mylar bags help maintain the quality and nutritional value of stored foods for longer periods.

  3. Protection from External Elements: Mylar bags offer superior protection against external elements such as light, moisture, pests, and odors, which can compromise the quality and safety of stored foods. This ensures that the contents remain fresh, safe, and free from contamination during storage.

  4. Versatility and Convenience: Mylar bags are versatile and can be used for various types of food storage, including long-term storage, emergency preparedness, camping, hiking, and travel. Their lightweight and flexible design make them easy to store, transport, and handle, providing convenient solutions for different storage needs.

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Benefits of Using Mylar Bags

Mylar bags offer a range of benefits that make them an ideal choice for food storage and preservation. In this section, we will explore the key advantages of using Mylar bags.

Long-Term Preservation

  1. Extended Shelf Life: Mylar bags provide an effective barrier against moisture, oxygen, light, and odors, which helps prolong the shelf life of stored foods. By creating a protective environment, Mylar bags prevent oxidation and microbial growth, ensuring that foods remain fresh and flavorful for extended periods.

  2. Suitable for Long-Term Storage: The superior barrier properties of Mylar bags make them well-suited for long-term storage of staple foods, emergency supplies, and survival rations. Whether storing grains, beans, rice, or dehydrated foods, Mylar bags help preserve the quality and nutritional value of stored items for months or even years.

Protection Against Moisture and Oxygen

  1. Moisture Barrier: Mylar bags are impermeable to moisture, making them ideal for storing dry goods such as flour, sugar, pasta, and spices. By preventing moisture ingress, Mylar bags help prevent clumping, mold growth, and spoilage, ensuring that foods remain dry and free from moisture-related issues.

  2. Oxygen Barrier: Oxygen can cause oxidation and rancidity in foods, leading to loss of flavor, color, and nutritional value. Mylar bags act as an effective barrier against oxygen, minimizing exposure to air and preserving the freshness and quality of packaged items.


  1. Tough and Tear-Resistant: Mylar bags are made from a durable polyester film that is resistant to tearing, puncturing, and abrasion. This ensures that the contents are well-protected during storage and handling, reducing the risk of damage or contamination.

  2. Suitable for Rough Handling: Whether stored in pantry shelves, backpacks, or emergency kits, Mylar bags can withstand rough handling and adverse conditions without compromising their integrity. This makes them ideal for outdoor activities, camping trips, and emergency preparedness.


  1. Affordable Packaging Solution: Mylar bags offer a cost-effective packaging solution for food storage, especially when purchased in bulk quantities. Their durability and long shelf life make them a worthwhile investment for both home and commercial use.

  2. Reduces Food Waste: By prolonging the shelf life of stored foods, Mylar bags help reduce food waste and save money on replacement costs. This makes them a sustainable choice for preserving perishable items and minimizing food spoilage.

Choosing the Right Mylar Bags

Selecting the appropriate Mylar bags is crucial to ensure effective food storage and preservation. In this section, we will discuss key factors to consider when choosing Mylar bags.

Thickness and Size Considerations

  1. Thickness: Mylar bags come in various thicknesses, typically measured in mils (thousandths of an inch). Thicker bags offer greater durability and puncture resistance, making them suitable for long-term storage and transportation. Choose a thickness that matches the intended use and storage conditions of the packaged items.

  2. Size: Consider the size of the Mylar bags based on the quantity and dimensions of the items to be stored. Ensure that the bags provide sufficient space for the contents while allowing for proper sealing and handling. Smaller bags are ideal for individual portions or small quantities, while larger bags accommodate bulk storage needs.

Oxygen and Moisture Barrier Properties

  1. Oxygen Barrier: Look for Mylar bags with excellent oxygen barrier properties to prevent oxidation and spoilage of packaged foods. Metallized Mylar bags with aluminum layers provide superior oxygen barrier capabilities, ensuring optimal freshness and shelf life for stored items.

  2. Moisture Barrier: Choose Mylar bags with a strong moisture barrier to protect against moisture ingress and humidity. Moisture-resistant Mylar bags help prevent clumping, mold growth, and spoilage of dry goods, ensuring that foods remain dry and free from moisture-related issues.

Zipper Closure vs. Heat Sealing

  1. Zipper Closure: Mylar bags with zipper closures offer convenience and ease of use, allowing for repeated access to the contents without the need for additional sealing equipment. Zipper closures provide a secure and airtight seal, ensuring freshness and preventing air exposure.

  2. Heat Sealing: Heat sealing is a popular method for closing Mylar bags, providing a reliable and airtight seal that preserves the freshness and integrity of stored foods. Heat sealing equipment enables precise control over the sealing process, ensuring uniform and secure seals for optimal protection.

Preparing Food for Storage

Properly preparing food for storage is essential to ensure freshness, safety, and longevity. In this section, we will discuss key steps for preparing food before storing it in Mylar bags.

Proper Cleaning and Drying

  1. Thorough Cleaning: Before storing food in Mylar bags, ensure that it is thoroughly cleaned to remove any dirt, debris, or contaminants. Wash fruits, vegetables, and other produce with water and mild soap, and rinse them thoroughly under running water.

  2. Complete Drying: After cleaning, allow the food to dry completely before placing it in Mylar bags. Excess moisture can promote mold growth and spoilage, so ensure that the food is dried thoroughly using a clean towel or paper towels.

Removing Excess Air

  1. Air Removal: When filling Mylar bags with food, take care to remove as much air as possible from the bags to minimize oxidation and prolong shelf life. Use a vacuum sealer or manual method to remove excess air by pressing down on the bag while sealing it.

  2. Tight Sealing: Ensure that the Mylar bags are tightly sealed after filling them with food to maintain an airtight environment. Proper sealing prevents air from entering the bags and helps preserve the freshness and quality of the stored items.

Using Oxygen Absorbers

  1. Purpose: Oxygen absorbers are packets containing iron powder that reacts with oxygen to create a vacuum-like environment inside Mylar bags. They help extend the shelf life of stored foods by reducing oxygen levels and inhibiting oxidation.

  2. Placement: Place one or more oxygen absorbers inside each Mylar bag before sealing it to remove residual oxygen and create a oxygen-free environment. Use the appropriate size and number of oxygen absorbers based on the volume and type of food being stored.

Packing Food in Mylar Bags

Properly packing food in Mylar bags is essential to maintain freshness and maximize shelf life. In this section, we will discuss the steps for filling, sealing, labeling, and dating Mylar bags for effective food storage.

Filling and Sealing the Bags

  1. Fill the Bags: Carefully fill the Mylar bags with the desired quantity of food, leaving some space at the top for sealing. Avoid overfilling the bags to ensure proper sealing and to allow for adequate air removal.

  2. Remove Excess Air: After filling the bags, use a vacuum sealer or manual method to remove excess air from the bags. Press down on the bags to expel air and create a tight seal that prevents oxygen exposure and maintains freshness.

  3. Heat Sealing: Once the bags are filled and excess air is removed, heat seal the bags using a heat sealer or iron. Run the heat sealer along the top edge of the bag to create a secure and airtight seal. Ensure that the seal is uniform and free from gaps or wrinkles.

Labeling and Dating

  1. Label the Bags: Use a permanent marker or adhesive labels to clearly label the contents of each Mylar bag. Include important information such as the type of food, quantity, and date of packaging. This makes it easier to identify the contents and rotation stock as needed.

  2. Date the Bags: In addition to labeling the contents, be sure to include the date of packaging on each Mylar bag. This allows you to track the freshness and shelf life of stored foods and ensures that older items are used before newer ones.

Storing Mylar Bags

Proper storage of Mylar bags is crucial to maintaining the quality and longevity of stored food items. In this section, we will discuss the ideal storage conditions for Mylar bags and important considerations to ensure optimal preservation.

Ideal Storage Conditions

  1. Cool and Dark Environment: Store Mylar bags in a cool, dark location away from direct sunlight and heat sources. Exposure to light and heat can accelerate oxidation and degrade the quality of packaged foods. A pantry, basement, or closet with stable temperatures is ideal for long-term storage.

  2. Low Humidity: Avoid storing Mylar bags in areas with high humidity, as moisture can compromise the integrity of the bags and lead to mold growth or spoilage of stored items. Choose a dry environment with moderate humidity levels to prevent moisture ingress and maintain freshness.

Avoiding Extreme Temperatures

  1. Avoid Freezing: While Mylar bags are resistant to low temperatures, avoid storing them in freezing conditions for extended periods. Freezing can cause the bags to become brittle and prone to cracking, compromising their integrity and effectiveness as a barrier against oxygen and moisture.

  2. Protect from Heat: Similarly, avoid storing Mylar bags in areas prone to high temperatures or fluctuations in temperature, such as near heaters, stoves, or vents. Exposure to heat can weaken the seals and degrade the quality of stored foods, reducing their shelf life and safety.

Organizing and Rotating Supplies

  1. Organize by Category: Keep Mylar bags organized by category or type of food to facilitate easy access and rotation. Group similar items together and label the shelves or containers accordingly to ensure efficient storage and retrieval.

  2. Rotate Stock: Practice first-in, first-out (FIFO) rotation to ensure that older stock is used before newer ones. Regularly check the expiration dates and condition of stored foods, and rotate the stock as needed to prevent waste and maintain freshness.

Common Mistakes to Avoid

While storing food in Mylar bags can be an effective way to preserve freshness and extend shelf life, there are several common mistakes that should be avoided to ensure optimal results. In this section, we will discuss these mistakes and how to prevent them.

Overfilling the Bags

  1. Risk of Bursting: Overfilling Mylar bags can put undue strain on the seams and seals, increasing the risk of bursting or tearing during storage or handling. Avoid filling the bags beyond their recommended capacity to prevent damage and maintain the integrity of the packaging.

  2. Air Removal: Overfilled bags may not allow for proper air removal, which is essential for creating an oxygen-free environment that preserves freshness. Leave adequate space at the top of the bags to facilitate air removal and ensure effective sealing.

Improper Sealing

  1. Incomplete Seals: Improper sealing of Mylar bags can compromise their effectiveness as a barrier against oxygen, moisture, and contaminants. Ensure that the bags are properly sealed along the entire length of the opening to prevent air ingress and maintain freshness.

  2. Seal Quality: Use a heat sealer or iron to create a tight and uniform seal that is free from gaps or wrinkles. Test the seals by gently pressing on them to ensure that they are secure and airtight before storing the bags.

Ignoring Expiration Dates

  1. Quality Control: Ignoring expiration dates or failing to label and date Mylar bags can lead to uncertainty about the freshness and safety of stored foods. Regularly check the expiration dates of stored items and rotate the stock to ensure that older items are used first.

  2. Quality Assurance: Label each Mylar bag with the contents and date of packaging to track the freshness and shelf life of stored foods. This helps prevent waste and ensures that you consume foods within their recommended storage period.


In conclusion, Mylar bags offer a versatile and effective solution for long-term food storage, providing protection against oxygen, moisture, and contaminants to maintain freshness and extend shelf life. By properly preparing, packing, and storing food in Mylar bags, you can preserve the quality and nutritional value of stored items while minimizing waste and ensuring convenience.

Throughout this guide, we have explored the various aspects of using Mylar bags for food storage, including preparation techniques, packing methods, storage considerations, and common mistakes to avoid. By following best practices such as proper sealing, labeling, and rotation of stock, you can maximize the benefits of Mylar bags and enjoy peace of mind knowing that your stored foods are well-protected and preserved.

Whether storing grains, beans, dried fruits, or emergency supplies, Mylar bags provide a reliable and efficient packaging solution for home use, commercial applications, and outdoor adventures. With careful attention to detail and adherence to recommended guidelines, you can create a well-organized and sustainable food storage system that meets your needs and preferences.

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