How To Seal Mylar Bags For Food Storage

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Emilly June 26, 2025

Mylar bags are renowned in the packaging industry for their secure and attractive packaging. They are also famous for extending the lifespan of their products. Mylar bags are not only adaptable but also flexible in packaging, as they are resilient.

Although Mylar bags have many qualities, if they are not sealed correctly, the product inside isn't 100% secure.

Why Is It Important To Seal Mylar Bags?

Due to various reasons, it is of great significance to be sealed properly.

Food Preservation

Preserving food is crucial, it is not only important in terms of wastage, but it is also linked to health. It is used for long-term food storage because of its manufacturing. Having foil on the inside makes it safer for food. But if the edge of the bag is not tightly sealed, it is not worth it.

FoodSaver Mylar bags need a better seal so that the shelf life of the food is longer.

Great Storage and Longer Shelf Life

For a longer shelf life, the pouch is made sure that it has no air, and how can air be stopped? Seal or reseal is the solution. If a Mylar is great in quality but has air in it, it won't work for an edible item that needs to be stored for a longer time.

Common Methods To Seal Mylar Bags

Let's discuss the ways to seal Mylar bags.

Heat Sealing

Heat sealing is the most common type of technique used to seal the Mylar bags. Fill the Mylar bag with the product and keep some space at the top. You can also put an oxygen absorber in the bag to remove as much air as you can.

Preheat the sealer according to the instructions. Now, close the bag from the top and keep the top part under the sealer. There should be space that is enough space to seal. Now heat the Mylar for a bit, and you will have your Mylar bag sealed within seconds.

Once it is cooled down, gently check if it is sealed correctly and is airtight now. If it is done, your bag is ready for longer-term preservation.

Vacuum Sealing

Fill the bag with the food or your product that needs to be stored. Avoid as much air as possible; you can put in many oxygen absorbers, if needed, more than one. The bag with the items of food is to be taken care of extra, or a regular FoodSaver that is keeping the food safe needs more precautionary measures while packing.

Put it into a vacuum sealer; it will extract as much air as is left inside. so that it can be preserved.

Check along the edges to make sure it is sealed correctly.

"A good seal means great protection".

Clip Or Clamp Sealing

Store your Mylar bags with the clip or clamp method, which is the easiest of all. Larger bags or smaller ones, both can be used to seal the bag. You just have to fold the edges and put a clamp on it so that it won't open. The most common things that are sealed this way are chips, cereals, or bread.

Ultrasonic Sealing

This is the modern technique that is used for long-term food storage or any other item that needs to be stored for a longer time. Thinner Mylar bags or the thick ones can both be sealed via this method.

You only need to put them into the ultrasonic machine, and there's no need to add excessive heat to the Mylar bag. It will give you a perfect airtight seal.

Zipper Sealing

Zipper sealing is seen mostly for snacks or many dried items, which are reused excessively. Attach the Mylar bag zipper and put it under the sealer; you will get a zipper and the sealer within a few seconds. The zipper gives it extra support for the reuse of the product, as the Mylar bag is puncture-free.

Adhesive Sealing

Adhesive sealing is known as the tightest among all, as it involves the glue or adhesive; the most commonly used adhesive is Loctite Plastic Bonder. It is cost-effective, and no heating process is required.

It is only done by the professionals and is also not a commonly used method.

Impulse Sealing

It is the process that requires the least heat of all. For some products, you need to take care of the heating process. This is best for those who need to avoid heat.

Which Sealing Method Works Best For Your Product

Among the above-mentioned sealing methods, you need to pick the best method for your product according to the demand of your specific products. For example, the food items that are ready to eat do not require too much heat, and on the other hand, there are some of the products that are dried and can take more heat. You can pick accordingly, and picking a professional packaging company is the key in this regard.

Why My Box Printing?

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