Heat Seal Mylar Bags: The Storage and Packaging Solution Brands Are Choosing for Long-Term Product Freshness

Freshness is a quality issue, but it's a brand issue as well. If a customer discovers the product is stale, the texture has been compromised or the aroma is degraded, the brand is at fault whether the product was good when it left the facility or not. For brands with airtight, moisture-proof packaging that will last from manufacturing to end-of-life, heat seal Mylar bags are the obvious choice. The barrier film and heat-sealed closure provide protection that no zip-lock seal or adhesive can provide, no matter the product, food, cannabis, supplements or specialty goods. 

What Makes Heat Sealing Different From Other Bag Closure Methods?

The press to close zipper, adhesive strips or fold over seals are used for most flexible packaging. These are designed for short-term use, but over time, they permit slow air and water infiltration. This issue is not an issue with heat sealing.

A heat seal mylar bag is a type of plastic bag that is heat sealed together at the opening, so that the seal is a physical part of the bag, rather than a mechanical closure on top of the bag. This creates air tightness and keeps oxygen, moisture and smell from passing through in either direction.

This is important in the case of products that require a long shelf life or delicate formulations. The product remains in its original state for much longer in a heat-sealed bag than in any other mechanical closure option.

Which Products Benefit Most From Sealed Mylar Bags?

Sealed Mylar bags are versatile for use with a variety of product categories, which more brands than you'd think consider. The format is suitable for any product that is susceptible to air, moisture or light degradation.

• Dried food and Grains like Rice, flour, freeze-dried meals and dehydrated vegetables will keep much longer in heat-sealed Mylar than in normal food storage bags.

• In the case of cannabis flower and concentrates, the airtight seal maintains the terpene profiles and keeps moisture from destroying the potency.

• It will not clump or separate in supplements and powders, including protein powders, pre-workout, and vitamin powders.

• Preserving roast freshness: Specialty roasters use heat-sealed Mylar with degassing holes to keep the CO₂ pressure down, preventing the roast from becoming stale.

• Seeds and agricultural products: long term storage requires absolute moisture control, only available with airtight sealing.

• Emergency preparedness products, such as food storage brands, make a special use of heat-sealed Mylar for the survival food kits with a shelf life of 10-25 years.

Are Custom Heat Seal Mylar Bags Worth the Investment for Smaller Brands?

Yes; and the price difference between stock and custom is less than most small brands realize.

Custom heat seal Mylar bags enable brands to be in control of all aspects of the packaging: size, thickness, print, finish, and seal configuration. Stock bags do not provide any of those. These are standard sized and have no brand identity or differentiation in the unboxing environment and on the shelf.

If you're a brand that sells specialty food or high dollar cannabis or a careful line of supplements, then generic packaging does more harm than good before the customer has even taken the lid off the product. Printing on a heat-sealed bag conveys a brand's commitment to quality, and that commitment is very much evident in their choice of packager.

Mylar Bags Wholesale: When Does It Make Sense to Scale Up?

An order of wholesale Mylar bags lowers the cost per unit, and guarantees a steady flow of the product during the peak production time. However, entering wholesale markets before a design is proven is a risky proposition and one without retail that leaves a brand with thousands of unusable bags.

The most common practice used by the more seasoned brands:

Phase One: Small Batch Testing

Get a quick custom print. Test bag in retail or test in their own customer base. Make sure it fits properly, will hold up to shipping, handling and is legible in real life and on product photos.

Phase Two: Wholesale Scaling

When the design is established, place a single order for a quantity of items, thus obtaining a better price per unit and a constant stock. Here the brand is aware that the bag is working and it's just a matter of cost and supply efficiency.

Phase Three: Seasonal and Product-Line Variations

Wholesale ordering facilitates brands to control multiple SKUs such as various sizes of an item, seasonal print changes or limited editions with a consistent structural specification.

Top Heat Seal Mylar Bag Manufacturers in the USA

Display Packaging Boxes

Direct manufacturer of custom heat seal Mylar bags and flexible packaging in food, cannabis, supplement and specialty applications. Provides low minimum order quantities, full custom print and a variety of seal and barrier specifications.

ProAmpac

Food, pharmaceutical and consumer goods companies at large commercial volumes that manufacture barrier pouches and heat-sealable film packaging in Cincinnati.

Constantia Flexibles

A worldwide flexible packaging supplier with manufacturing in the USA. Manufactures high barrier laminate films and custom heat seal packaging for food, pharmaceutical and specialty retail brands.

What Brands Should Confirm Before Ordering Heat Seal Mylar Bags

The most common and costly errors that brands make with flexible packaging can be avoided with a structured order process.

• As each product has different oxygen transmission rate (OTR) and moisture vapor transmission rate (MVTR) requirements, make sure these specifications are confirmed with the manufacturer before choosing the material

• Confirm Seal Width, a wider seal will offer a better seal but will limit the inside volume of the product or fill equipment; determine the correct balance for the product being sealed and the fill equipment

• Verify fill equipment compatibility: the width of the jaws and the heat seal temperature of the existing filling and sealing equipment need to match the width of the fill equipment and the temperature of the heat seal on the fill equipment.

• Determine end product size before artwork: a bag being designed to the wrong size not only wastes sample production costs, but also artwork.

• Get a sealed sample before the full production: test the real integrity of the seal, not the proof of the seal on paper

Collaborating with a direct manufacturer accelerates every step. Display Packaging Boxes has an in-house manufacturing facility for heat seal Mylar packaging and technical support is provided before any full production run begins, when selecting the packaging material, specification barrier and seal testing.

Final Thoughts

The heat seal Mylar bags provide a protection level that mechanical closures can't match. The heat seal format is the most dependable type of flexible packaging available for brands when freshness and shelf life are critical and integrity of the product is a must. This format is suitable for any brand size thanks to custom print options, low MOQ access, and scaling pathways for wholesale. Over time, brands that make packaging a technical and brand decision versus only a logistics decision are always more successful in delivering a better product experience and customer loyalty.