A heat sealer (also called an impulse sealer) is a simple, fast way to seal poly bags, poly tubing and cellophane bags — keeping products airtight and protected from moisture and contamination. This guide shows you how to use one, and how to replace the heating element when it eventually burns out.
How to use a heat sealer
- Press the handle down to release the bracing strap.
- Set the dial to suit your bag's gauge (thickness in µm). As a rule, use the lowest setting that still gives a clean seal — it makes the element last far longer.
- Place your product in the bag.
- Lay the open end of the bag flat over the heating element, lined up straight.
- Press the lever down and hold until the indicator light switches off — that means the seal is done.
- Raise the lever and move on to the next bag.
Hot tip: matching the setting to the bag gauge is the single biggest factor in element life. Thicker bags need more heat; thin bags seal on a low setting.
How to replace the heating element
Over time the element (the metal strip that heats up) burns out — sooner if you run high settings. Replacements are affordable and easy to fit:
- Turn the machine off first — important for safety.
- Unscrew the two plates holding down the Teflon strip.
- Remove the plates, then unscrew the covers at each end of the element.
- Lift out the burnt-out element.
- Fit the new element starting at the hinge end, then push the other end into place with a screwdriver.
- Screw the covers and plates back on, plug in, and you're ready to seal again.
FAQ
What can a heat sealer seal?
LDPE/poly bags and tubing, cellophane, and most heat-sealable films. It won't seal foil-lined or non-heat-sealable materials.
Why won't my bag seal properly?
Usually the setting is too low for the bag gauge, or the bag isn't lined up flat. Step the setting up one notch at a time until you get a clean, continuous seal.
How long does a heating element last?
It depends on usage and setting — running the lowest effective setting dramatically extends its life. Keep a spare repair kit on hand.
Where to buy
Shop heat sealers, replacement elements and repair kits at QIS Packaging — delivered Australia-wide. Call 1800 555 343 or email info@qispackaging.com.au.
