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Using a Foodsaver to Seal Mason (Glass) Canning Jars

Updated on March 31, 2015

Vacuum Seal Glass Jars

Aside from using my Foodsaver® to vacuum seal steaks, chicken, vegetables, etc. in plastic bags for the freezer, I also use it to seal food in glass jars. Using glass jars not only reduces our carbon footprint, it saves us money. Unlike plastic bags, glass jars can easily be washed and reused over and over thereby saving the cost of re-buying plastic bags. Glass jars are a great, easy way to store something that might otherwise be crushed, when vacuum sealed in plastic bags. Because vacuum sealing removes air inside the jar, foods last longer. This again saves money by wasting less food. Glass jars can also be used for non-food items. They come in many different sizes: from 4-ounce jars to quart-size jars. That box of macaroni you only used half of? Seal it. Sealing in a glass jar will keep out bugs and moisture. The horseradish that invariably always goes bad once it is opened? Re-seal it in a 4-ounce jar and put it back in the refrigerator for the next time. Rice, cashews, beans and maple syrup are just a few ideas of what can be vacuum sealed in a jar!

The jar sealer comes in two sizes: large and small. The large is for the wide-mouth jars and the small is for jars with the regular or original-size opening. To seal jars, you will need a Foodsaver® vacuum sealer, jar sealer, accessory hose, glass jars, canning lids and canning rings (optional).

But beware! Once you start sealing in jars, it just might become an obsession. Hopefully your spouse/significant other/children won't come home to their socks and underwear sealed in a glass jar!

Remember that vacuum sealing is not a substitute for canning; refrigerator foods must still be kept in the refrigerator. Foods that are vacuum-sealed will not last forever, but most will last longer than if they were not vacuum-sealed.

Foodsaver with Jar Sealer

How to Seal the Jar

1. Plug accessory hose into Foodsaver® vacuum sealer.

2. Plug opposite end of accessory hose into the jar sealer.

3. Place food or non-food item inside jar.

4. Place canning lid on top of jar, carefully lining up edges.

5. Place jar sealer on top of jar and canning lid.

6. Start Foodsaver®.

7. Foodsaver® should automatically shut off, when jar is sealed.

8. Hit Open/Cancel button (if necessary on your particular model).

9. Check to make sure jar is properly sealed by trying to lift it off with your fingers. If it will come off easily, you will need to re-seal.

Optional Canning Ring

It is only necessary to use the canning ring after the seal is broken and only if the jar will not be resealed with the Foodsaver®. Its purpose is to keep the lid on and properly closed after the seal is broken. If the jar will be re-sealed with the vacuum sealer after opening, the canning ring is not necessary although recommended in case the seal breaks.


Do not re-use a lid for canning that has already been used for vacuum sealing.

Add Your Comment

What do you use your Foodsaver jar sealer for?  Please share your ideas below under "Comment."


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    • LydiaBlogg profile imageAUTHOR


      3 years ago from New England

      I'm sorry, but I have no idea. It would be a good idea to contact Foodsaver with this question.

    • profile image


      4 years ago

      i am having a problem sealing this one jar with my wide mouth sealer it just wont seal allthe rest of the jars seal well i have examined the jar and cant find anything wrong with it what could be wrong?

    • LydiaBlogg profile imageAUTHOR


      6 years ago from New England

      Thanks Uk for the hot tip on possible defects! Glad to hear the company was helpful.

    • profile image


      6 years ago

      received this sealer and it was defective. So I recommend people unpack and check it right away. I called Food Saver and the rep was courteous and helpful.

    • LydiaBlogg profile imageAUTHOR


      7 years ago from New England

      Hi Kent - Be certain the jar sealer is sitting perfectly flat and making contact with the top of the jar. Are you by any chance using a lid that was already used? I find they sometimes don't want to seal (especially if I previously used them for canning). If I have trouble sealing a lid, I usually hold down the jar sealer while it is sealing; most of the time this works. For some odd reason, I seem to only ever have trouble with the small jar sealer. I think my small lids were used for canning, but I may have opened a new package of the wider lids. I’ve been using them for so long it is hard to remember for sure. Also, if you are using old lids, look at the outer ring to make certain they are not bent. Does this help?

    • profile image

      kent cummings 

      7 years ago

      unable to use your (how to seal the jar)it just didn't work.what am I doing worng


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