Choosing a Sealer

Choosing a Sealer

What is it you are trying to seal?

Heat sealers are used to seal a wide range of products from food, pharmaceutical, hardware and other materials into thermoplastic bags. The heat sealed bag ensures that your product is tamper proof, air and water tight and hygienic. You may have a standard type of bag or pouch where the seal is just two layers or if your bag has a side gusset (like a coffee pouch) or a central folded seam then you may need to seal 4 layers.

What is the Material?

The bags or pouches can be single layer or multilayer one of which must be thermoplastic for example:

  • Polyethylene (PE, HDPE, LLDPE)
  • Polyvinyl Chloride (PVC)
  • Polyethylene Terephthalate (PT)

Note: Foil and craft paper pouches normally include at least one thermoplastic layer.

What is the size?

The width of the sealer depends on the maximum width of the bag you are sealing, always choose a sealer that is at least 20 – 50mm wider than the width of your bag, which ensures that the bag can be easily positioned without overlapping the ends of the sealer. A wider sealer is better!

The thickness of your material if important too, the thickness can be quoted in micro (µ), gauge, mm, or inches! – micron and gauge are the most common. Use the conversion table below.

µ gauge mm Imperial
25 100 0.025 0.001″
50 200 0.050 0.002″
75 300 0.075 0.003″
100 400 0.100 0.004″
125 500 0.125 0.005″
150 600 0.150 0.006″
175 700 0.175 0.007″
200 800 0.200 0.008″
225 900 0.225 0.009″
250 1000 0.250 0.010″
275 1100 0.275 0.011″
300 1200 0.300 0.012″
350 1400 0.350 0.014″
400 1600 0.400 0.016″
450 1800 0.450 0.018″
500 2000 0.500 0.020″


Generally our heat sealers can seal a range of material thicknesses from:

25µ (micron) up to 250µ or 100 gauge up to 1000 gaugeIf you are unsure of the material send PackSealer a sample for us to test and identify the best heat sealer.

How many bags do you have to seal?

The type of sealer will depend on the number of bags you plan to seal; low usage  up to 200 per daymedium usage  200 – 2000 per dayhigh usage over 2000 per day

Share this post

Leave a Reply

Your e-mail address will not be published. Required fields are marked *