Aluminium heat-seal bags

Which bag size fits your contents?

Start with what you want to pack. Measure the contents in the shape they will take inside the bag and leave space around them. You need a flat, clear strip at the top to seal the opening. A bag that only just fits the contents gives you little room to work.

30 × 40 cm is the most compact size. For more space, compare 45 × 56 cm and 56 × 91 cm. 91 × 130 cm is the largest option. Choose by the dimensions of your contents rather than a fixed weight or litre capacity: volume and shape vary between materials.

Weigh portions first with weighing scales, then choose a suitable bag. Keep the sealing edge clear instead of filling the bag to the top. This leaves room to lay the opening flat.

Compare the four sizes

Size	Position in the range	What to check
30 × 40 cm	Most compact option	Leave room above and beside the contents
45 × 56 cm	Larger than 30 × 40 cm	Measure the contents as they will be packed
56 × 91 cm	More space than 45 × 56 cm	Keep the sealing edge clear
91 × 130 cm	Largest option	Allow enough workspace to lay the opening flat

Closing the bag with an iron or heat sealer

These bags close with heat from an iron or a suitable heat sealer. Flatten the opening and keep the sealing strip clean and free of material. Creases, dust or material between the layers can interrupt a continuous seal.

Set temperature, pressure and contact time using the instructions for the bag and your sealing equipment. A single temperature setting is not suitable for every bag. After sealing, check the entire opening for gaps, uneven sections and damage.

Dry first, then pack

A sealed bag does not provide airflow for material to continue drying. Finish drying before packing it. Use a drying net for that earlier step and spread the material with space between it.

Pack on a clean, dry work surface. If you need to use small amounts regularly, divide the material into suitable portions. Explore packaging and storage for more packing options.

Questions about aluminium heat-seal bags

Need help choosing a bag size?

Tell us the dimensions of your contents and how you plan to seal the bag. We can help you choose a suitable size.

Measure the contents before ordering
Leave space for the sealing edge
Check your sealing equipment

Contact us

Aluminium strijkzak, 91x130cm

Aluminium strijkzak, 56x91cm

Aluminium strijkzak, 45x56cm

Aluminium strijkzak, 30x40cm