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December 1, 2025
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How to vacuum seal food in Mason Jar Sealer?
Vacuum sealing food in Mason jar vacuum sealer is a game-changer for preserving freshness—whether you’re storing homemade jams, dried snacks, or leftover meals. It locks out air, slows spoilage, and keeps flavors intact for months. With a Mason jar vacuum sealer, the process is simple, even for beginners. Follow this easy guide to master it in minutes.
Safety Notes
Read all instructions carefully in this manual before use.
- Do not place appliance on wet surfaces.
- Do not place appliance on unflat surfces.
- Close supervision is necessary when appliance is used by or near children.
- Do not allow appliance to be used as a toy.
- Do not use the product while charging.
Before to use
1.Operation: press and hold the button for 2 seconds to power on & off.
2.After the machine finishes vacuuming air, within 3 seconds, the vacuuming operation cannot be initiated again by pressing the button.
3.The Air Vent of a vacuum sealer shall not be blocked.
4.The Mason jar sealer will automatically show the remaining battery percentage (e.g., "75%") once the vacuuming process is completed.
Charging
When you connect the Mason jar sealer to a power source to start charging, the screen will immediately display the real-time power percentage clearly, such as 80%. This allows you to have a clear and instant understanding of the charging progress.
Notice:The Mason jar sealer will show “LO”when the machine is low battery.
Regular Mouth Mason Jar Lids
Vacuum Operation for Mason Jar
Step 1: Prep Your Mason Jar and Food
First, ensure your Mason jar is clean, dry, and free of cracks—any damage can break the vacuum seal.
Next, prepare your food:
For wet or liquid-based foods (like soups or sauces), let them cool completely to avoid steam interfering with the seal.
For dry foods (like nuts or grains), fill the jar to about ¾ full—leave a small gap at the top to prevent overflow during sealing.
Once the food is in the jar, place the flat Mason jar lid on top (no need to twist it tight) and screw the metal ring around the lid until it’s finger-tight—overtightening will stop the sealer from removing air properly.
Step 2: Take your Mason jar sealer (the attachment that connects to your vacuum device) and align its opening with the top of the Mason jar. Make sure the sealer sits evenly on the jar’s mouth—this creates an airtight connection. Gently press down horizontally until you feel it “click” or sit securely in place. If it wobbles, adjust it to ensure a tight fit—this is key to a successful vacuum.
4.Once the vacuum jar sealer finishes the vacuuming process, the remaining power will be displayed automaticcally .
Mastering Mason jar vacuum sealing isn’t just about preserving food—it’s about turning simple storage into a way to lock in homemade flavors, cut down on waste, and keep your pantry organized for weeks or even months. Once you get the hang of these easy steps, you’ll find yourself reaching for your sealer and jars again and again—whether it’s for batch-cooked soups, summer’s fresh berries, or crunchy nuts that stay crisp. With a little practice, this handy technique will become second nature, making every meal prep session smoother and every stored ingredient taste just as fresh as the day you sealed it.
Vacuum Operation for Air Valve Bags
1. Seal the air valve bags with clips from one end of the bag to the other, making sure the bag is completely closed.
2. Install the air valve; align the tube’s airtight nozzle with the plastic valve of the bag to ensure a tight seal.
3. Press and hold the power button for 2 seconds to extract the air from the air valve bag, or press the power button directly while the device is powered on.
4. When the vacuum jar sealer starts working, it will display the vacuuming duration in seconds, and the vacuum bag will gradually contract.
5. Once the vacuuming process is completed, the vacuum jar sealer will show the remaining battery percentage (e.g., “power: 95%").
FAQ:
Q:What sizes of jars and lids are compatible with the Mason Jar Vacuum Sealer?
A:It is compatible with both regular-mouth and wide-mouth jars. Specifically, it works with jars with a mouth diameter of 70mm and 86mm, as well as lids of 70mm and 86mm.
Q:Besides Mason jars, can the mason jar sealer be used to vacuum-seal other containers like food storage containers or vacuum sealer bags?
A:Yes. In addition to Mason jars, it can also vacuum-seal plastic valve bags, flat valve bags, food storage containers, and even wine bottle caps.
Q:Can liquid ingredients be placed in Mason jars during vacuum-sealing?
A:No, liquid ingredients should not be put in Mason jars when using the mason jar sealer.
Q: Do I need to press the jar manually during vacuum-sealing?
A:Yes, you need to press the jar manually at the beginning to create an airtight environment for vacuum-sealing.
Q: What should I do if the vacuum-sealing button of the vacuum jar sealer doesn’t respond when pressed?
A:Our vacuum jar sealer requires a 2-second long press to turn on or off. Please check if you are pressing and holding the button correctly.
Q: If the metal lid gets deformed during vacuum-sealing, can it still be used?
A:Deformed metal lids may not provide a proper seal, so it is not recommended to reuse them to ensure vacuum freshness.
Q: Will the vacuuming efficiency of the vacuum jar sealer decrease after long-term use?
A:Regular wear of parts (such as gaskets) may slightly reduce efficiency. Proper maintenance (e.g., cleaning the air nozzle, replacing gaskets) can help maintain its performance.
Q:Can the air nozzle be replaced separately if it is damaged?
A:Yes, you can contact us to replace the damaged air nozzle separately.
Q:For non-human-caused malfunctions, can the vacuum jar sealer be replaced with a new one for free?
A:Please send the faulty mason jar sealer to us for inspection. If the malfunction is confirmed to be non-human-caused, we will provide free repair services.
Q: Is on-site repair service available for the mason jar sealer?
A:We do offer on-site repair services, but whether on-site repair is needed will depend on the specific situation of the malfunction.
Q: Can the vacuum jar sealer work normally while being charged?
A:No, the mason jar vacuum sealer cannot operate during charging. It must be disconnected from the power source to perform vacuum-sealing.
Q:What is the weight of this mason jar vacuum sealer, and is it easy to carry?
A:It features a lightweight design (specific weight can be provided upon request) and is compact, making it convenient for storage and carrying.
Q:Does the device have safety protection designs (such as anti-misoperation)?
A:Yes, it is designed with a 2-second long press for power on/off to prevent misoperation, ensuring safe use.
Q: Is an operation tutorial video provided after purchasing the vacuum jar sealer?
A:Yes, an operation tutorial video is available to guide you through the usage steps.
Q: Can you provide the product quality inspection report?
A:Yes, we can provide the product quality inspection report upon request.
Q: Will the vacuum jar sealer shut down automatically if I forget to turn it off after vacuum-sealing?
A:Yes, it will shut down automatically once the vacuum-sealing process is completed.
February 21, 2011
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Why not simply fill tempered jar to 90% capacity while hot apply lit & lock?
As the steam condenses it creates a "partial vacuum".
Matthew Quigley on handguns:
“I said I never had much use for one. Never said
I didn't know how to use it.”
DWF Supporters
July 12, 2020
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SPAM!!!!!!
Please delete account
Dans Club
December 7, 2020
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Is it easier to "unseal" a Mason Jar with a .357? or a .44?
February 16, 2016
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Answer to a question we never asked.
Supporter
Dans Club
March 25, 2013
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Is this still the Dan Wesson Forum? First post in days and nothing about guns? I guess everyone is busy hunting, watching football and shopping. Except me. I started repotting my bonsai on Nov 2 and won't get done till March. I have more bonsai than Dan Wessons. But I don't have to water the guns twice a day.
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