How to Seal Mylar Bags With a Clothes Iron

Sealing a Mylar bag with a clothes iron takes about ten seconds once you know the settings.

The iron's heat melts the bag's inner layer into an airtight bond, the same result a heat sealer gives, for free.

Here's how.

Why Use a Clothes Iron to Seal Mylar Bags?

You don’t need any fancy equipment to seal Mylar bags. In fact, one of the biggest reasons people love this method is because almost everyone already has a clothes iron at home.

No heat sealer, no extra tools, no special setup. Just plug in your iron and you’re ready to go.

This method is also very affordable.

A clothes iron does the same job as an expensive heat sealer without the extra cost. It’s fast too.

Once you get the hang of it, sealing each bag only takes a few seconds, making it perfect when you’re storing a lot of food at once.

Most importantly, it’s reliable. When done correctly, an iron creates a strong, airtight seal that protects your food from air, moisture, and pests.

That’s why this technique is so popular for long-term food storage and emergency preparedness. 

By the way, have you tried heat sealer for Mylar bag sealing?

Step-by-Step : How to Seal Mylar Bags With a Clothes Iron

This process is easy once you’ve done it a couple of times. Just follow these simple steps and you’ll get a strong, airtight seal every time.

Step 1 : Fill & Prepare the Bag

Start by filling your Mylar bag with the food you want to store. Leave about 1 to 2 inches of space at the top so the bag can be sealed properly.

Drop in an oxygen absorber if you’re storing dry food long-term. Gently press the bag to remove as much air as possible before sealing.

Step 2 : Set the Iron Correctly

Plug in your iron and set it to medium or high heat, usually the “cotton” setting works best.

Make sure the steam option is turned off. Steam adds moisture, and moisture is the enemy of long-term food storage.

Step 3 : Position the Bag for Sealing

Lay the top of the bag flat on a heat-safe surface like a wooden table or cutting board. Place a piece of parchment paper or a thin towel over the bag’s opening.

This protects the Mylar from direct heat and prevents melting or burning.

Step 4 : Apply Heat & Seal

Press the iron firmly along the top edge of the bag for about 2 to 4 seconds.

Move slowly across the opening, creating one clean seal line. You should see the layers fuse together as the heat is applied.

Step 5 : Check the Seal

Let the seal cool for a few seconds. Look at it closely to make sure there are no gaps or weak spots.

Then gently tug on the top of the bag. If it doesn’t pull apart, your seal is strong and complete.

How Long Will Iron-Sealed Mylar Bags Last?

When sealed the right way, iron-sealed Mylar bags can protect your food for 10 to 25 years, depending on what you store and where you keep it.

This is why so many people rely on Food Storage Mylar Bags for long-term emergency supplies and everyday storage.

Dry foods like rice, beans, flour, and pasta last the longest when oxygen absorbers are used and the seal is done properly.

Storage conditions matter just as much as the seal. Keep your bags in a cool, dark, and dry place, and they will last much longer.

Learning How to seal mylar bags for long lasting food storage gives you real control over your food supply and helps prevent waste, spoilage, and unwanted pests.

Best Storage Tips for Long-Term Results

Once your Mylar bags are sealed, where you store them makes a big difference.

• Always choose a cool, dark, and dry place. Heat and light can slowly break down food quality, so a closet, basement, or storage room works great.
• For extra protection, place your sealed bags inside plastic buckets or storage bins. This keeps rodents, insects, and moisture away.
• Finally, don’t forget to label each bag with the food name and sealing date. 

Final Thoughts

That's all there is to it.

A clothes iron seals Mylar bags as tightly as any machine, so long as you use dry medium-high heat, seal across the full width, and test the bond once it cools. 

When you're ready to seal a batch, Roylo Globe carries Mylar bags and oxygen absorber kits in every size, from quart bags for everyday portions to 1-gallon bags for bulk, with the absorbers and labels included.