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Adjust the machine so that it will seal the cans you intend to use. Cans come in a variety of sizes. The adjustment dial on the bottom raises the can pedestal up or down. Some can sealer machines may not have a dial function; instead, they use a raising arm.
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Fill the can to within 1/4-inch of the top. Can sealers are typically used for dry goods such as beans, flour, rice and other staple foods. It's possible to seal wet foods -- use the canning guide that came with the machine for instructions to do so.
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Place an absorbing packet on top of your dry goods. Most dry goods require the use of an oxygen-absorbing packet to keep them fresh.
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Put the lid on the top of the can. Make sure the lid is facing the right way; ridges should be on the top. Place the can on the can pedestal. Press the lower level on your machine to lift the raising disk or can pedestal. Press the lever down and to the left to lock it into position.
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Push the sealing handle away from you to begin the sealing operation. Increase pressure on the sealing arm for approximately five seconds. Repeat the action with the sealing handle pulled toward you. This completes the can seam or sealing process.
Check out this related video from Homesteady on Youtube.