If you’re wondering about standard Mylar bag thicknesses, they typically range from 2 to 10 mils. Thinner bags (2-3.5 mils) are great for short-term storage of light items, while medium thickness (4-5 mils) works well for food and general packaging and storage.
Thicker bags (7-10 mils) offer the best protection for long-term storage or sensitive items like seeds and electronics. The right thickness depends on what you’re storing and for how long. These are the standards as of now, but if you want it broken down by uses and much more, we’ve got you covered.
Let’s start with the basics.
What Are Mylar Bags?
Mylar bags are strong storage bags made from a material called BoPET, which stands for biaxially-oriented polyethylene terephthalate. This material is tough, lightweight, and flexible. Mylar bags are often used for food storage because they block air, moisture, and light. This helps keep items fresh for a long time.
People use Mylar bags for many things, not just food. They are great for storing seeds, electronics, and important documents. Mylar bags can be found in different sizes and thicknesses, which makes them useful for small or large storage needs.
Why Thickness Matters
The thickness of a Mylar bag is an important factor. Thicker bags are better at protecting items from damage, while thinner bags are easier to handle and take up less space. Choosing the right thickness depends on what you are storing and how long you need to store it.
For example, if you are storing rice for a year, you might choose a thinner bag. If you are storing seeds for five years, you will need a thicker bag. Thickness can also affect how easy the bag is to seal and whether it can resist punctures or tears.
Understanding Mylar Bag Thickness
Mylar bag thickness is measured in “mils” or “microns.” These terms describe how thick the bag is. One mil equals one-thousandth of an inch, and one micron equals one-millionth of a meter. For example, a 5-mil bag is thicker and stronger than a 3-mil bag.
Understanding these measurements is important. A thinner bag, like 2 or 3 mils, might work for light use or short-term storage. Thicker bags, like 7 or 10 mils, are designed for heavy-duty use or long-term storage. If you’re not sure what you need, start by thinking about how much protection your items demand. At Dura-Pack, we want you nto see the entire picture, so let’s get started.
Standard Thickness Categories
2-3.5 Mil Mylar Bags
These are the thinnest Mylar bags available. They are good for storing light and dry items, such as snacks, powders, or small parts. These bags are affordable and easy to use. However, they are not the best option for long-term storage or items that need a high level of protection.
If you’re packing dry spices or nuts for a few weeks, a 2-mil bag might be fine. But if the bag will face rough handling, it could tear easily. That’s when thicker bags are a better option.
4-5 Mil Mylar Bags
This is the most common thickness for Mylar bags. They are versatile and work well for storing food like grains, beans, or pasta. These bags offer a balance between durability and ease of use. Top brands use these predominately.
A 5-mil bag is a good choice for medium-term storage, such as one to five years. They keep out most air and moisture, making them reliable for many household needs. These bags are strong enough to handle light stacking or transportation without tearing.
7 Mil Mylar Bags
At 7 mils, these bags are thicker and much stronger. They provide better protection against air, moisture, and light. They are a great option for long-term food storage, like freeze-dried meals, emergency supplies, or even beef jerky.
If you live in a humid area or want to store items for 10 years or more, 7-mil bags are worth considering. They are tougher and less likely to puncture or tear compared to thinner bags.
10 Mil and Above Mylar Bags
These are the thickest and strongest Mylar bags. They are designed for heavy-duty use and can handle rough environments. People use these bags for industrial purposes or to store large, heavy items.
For example, a 10-mil bag can be used to store bulk grains, large hardware, or equipment. These bags can also protect items from extreme conditions, such as high humidity or frequent handling.
Choosing the Right Thickness
Storage Duration
Think about how long you plan to store your items. For short-term storage, a thinner bag will work fine. For long-term storage, such as five years or more, thicker bags are better. They create a stronger barrier against air and moisture.
For example, if you are storing coffee beans for a month, a 3-mil bag might work. But if you’re storing the same beans for two years, a 7-mil bag will keep them fresher.
Product Sensitivity
Different items need different levels of protection. Food, seeds, and electronics are more sensitive to air, light, and moisture. These items require thicker bags for better protection.
For example, electronic parts can be damaged by humidity. A thick Mylar bag will keep them dry and safe. Similarly, seeds stored for planting need a strong barrier to stay viable.
Environmental Conditions
Where you store your items matters. If you’re storing them in a basement, garage, or other humid areas, thicker bags are a must. They will protect your items better than thin bags.
If you live in a hot, dry climate, thinner bags might work for short-term use. But for long-term storage, even in dry areas, thicker bags offer better peace of mind.
Benefits of Choosing the Right Thickness
Protects Items Better
Thicker Mylar bags keep air, moisture, and light out better than thinner ones. This is important for items like food, seeds, or electronics. For example, a thick bag can help rice or beans stay fresh for years. It also protects sensitive electronics from damage caused by humidity.
Prevents Damage
Thick bags are less likely to tear or puncture. This is helpful if you need to move or stack the bags. For example, if you’re packing items for shipping or storing them in a crowded space, thicker bags can handle the pressure without breaking.
Saves Money
Using the right thickness helps you save money in the long run. Thin bags might cost less upfront, but they can fail over time. Thicker bags protect your items better, so you don’t have to replace spoiled food or damaged goods.
Additional Tips for Using Mylar Bags
Oxygen Absorbers
Oxygen absorbers are small packets that remove air from the bag. They help keep food fresh for a longer time. If you’re storing dry goods like grains or pasta, adding oxygen absorbers is a good idea. Make sure to choose the right size absorber for the bag.
Sealing the Bags
To seal Mylar bags properly, use a heat sealer or a household iron. Heat sealing makes sure the bag is airtight. If the seal is weak, air can get inside and ruin the stored items. For thick bags, a stronger heat sealer might be needed to make a good seal.
Labeling and Storing
Always label your bags with what’s inside and the date you packed them. This helps you keep track of your stored items. Store the bags in a cool, dry place to extend their lifespan. Avoid putting them in direct sunlight or near heat sources.
Common Mylar Bag Dimensions
Mylar bags come in many sizes to suit different needs. Some common dimensions include:
- 1-gallon bags (10″ x 14″): Perfect for small to medium food storage like rice, beans, or pasta.
- 5-gallon bags (20″ x 30″): Ideal for bulk storage, such as grains or emergency food supplies.
- Quart-sized bags (8″ x 12″): Great for smaller items like spices, nuts, or electronics.
These sizes are just a starting point. Other dimensions are available to match your specific storage needs, branding and thickness.
Conclusion
Mylar bags are a great product. Choosing the right thickness is important for protecting what’s inside. Thin bags work for short-term needs or lightweight items. Thick bags are better for long-term storage or delicate items.
With the right tools and care, Mylar bags can keep food, seeds, granola, flour, sugar, frozen foods and other items safe for years. Adding oxygen absorbers, sealing the bags tightly, and storing them correctly will help you get the most out of your storage.