How do you seal Mylar food bags?

Last Updated on July 13th, 2023

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When it comes to Mylar bags, there are two different approaches to keeping dry goods and foods inside their pouches. First, there are reusable versions with a zip-lock-like resealable opening that is repeatedly subject to the sealing process. 

Then you have the single open packaging, which carries specialized products that will only have a single vacuum sealing process to suck out all the excess air and gasses from the packaging. 

This will require a vacuum sealer and accompanying tools for both processes at the beginning, and they create an optimal storage environment for those dry goods and foods. 

Do Mylar Bags need to be Sealed?

When it comes to the Mylar bag, there is the new packaging and the second-use approach. First of all, the Mylar bags are sealed using the vacuum sealing process to ensure the products stored within are going to last for the long term. 

Preppers will need to get a hold of these tools and tech or utilize manual processes to roll out excess area and use oxygen absorption packets to remove the rest. 

This will go along the lines of the second usage or reusable methods when such tools are not available or affordable. To answer the question, yes, all Mylar bags must be sealed to preserve the contents within. 


How Much Heat Does it Take to Seal a Mylar Bag?

When it comes to getting a quality heat seal, there is a general consensus regarding the correct temperature to use. At this point, it would be recommended to see the temperature to seven hundred to seven hundred and twenty-seven degrees Fahrenheit. 

This will depend on the thickness of the Mylar material, which can range between two and seven plus miles, which can increase or decrease the required heat for a quality seal. 

When you think about the sealer itself, there will be industrial heat seal machines like the Uline products but also at-home sealers, which will be set between three hundred and seventy-five and four hundred- and twenty-five degrees Fahrenheit. 


How to do it the Right Way?

To start, if you are going to be storing something for the long term, you will have to remove the excess air and gasses to create a true vacuumed environment. 

This means you will have to use the right gadgetry or manual processes to remove as much air as possible. Everyone knows you cannot get all of the oxygen out during this step. 

Before you start the sealing process, be sure to add oxygen absorbers to remove the excess air from the packaging after the initial seal is created. 

This will be the only way to ensure that the packaging is completely void of any elements that could encourage bacterial or microorganism growth. 


How Long Does it Take to Do it?

Doing the best seal the right way will take longer than just the initial seal. To start, there needs to be a trial period in which you dial down how many oxygen absorbers are going to be needed to remove all of the excess air from the inside of the packaging. 

After that, you can factor in the thirty or so minutes that were required to create a solid seal; even after that, the process continues with the oxygen absorbers job which takes place for different lengths of time depending on the excess gasses left inside. 


How Can You Tell if it’s Sealed Properly?

A few checks can be performed when it comes to checking for a proper seal, including simple pinching of the pouches to feel it out, which can take years to develop the right touch. 

Otherwise, specialized systems, machinery, and tools are designed to check these seals. 

Here are some official tests you can employ for your seal checker needs:

  • Bubble emission test – Can be done during the vacuum sealing process.
  • Gas leak test – Uses a small amount of helium gas released inside, then a sensor test if the gas is inside or leaking out of the packaging. 


Final Thoughts on How do you Seal Mylar food Bags

When it comes to appearing professional in the business world, performing these checks on the seals and executing when it comes to sealing your Mylar bags properly means knowing the perfect amounts.

Once you learn the number of oxygen absorbers you need per package, what the heat setting is required for the thickness of Mylar materials being used, and knowing other basics when prepping a space for long term storage needs, you’re ready to go.


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