Most people choosing packaging tape look at width and colour and stop there. The adhesive underneath the film matters just as much, sometimes more, depending on what you're sealing and where it's being stored or shipped. Hot melt and acrylic are the two main adhesive types used in standard packaging tape, and they behave differently enough that picking the wrong one for your situation can mean weaker seals, particularly in certain conditions.
This guide explains the practical difference between hot melt and acrylic adhesive tape, and how to choose between them based on what you're actually sealing.
What's actually different between them
Both are pressure-sensitive adhesives applied to a polypropylene film backing, and from the outside, a roll of hot melt tape and a roll of acrylic tape look identical. The difference is in the adhesive chemistry itself, and that difference shows up in how each performs under different conditions rather than in how the tape looks or feels on the roll.
Hot melt adhesive
Hot melt adhesive is a thermoplastic compound, melted during manufacturing and applied to the tape backing, which then cools and sets. It's known for a strong initial tack, meaning it grips almost immediately on contact with a surface, and for high tensile strength, which makes it well suited to heavier or bulkier boxes where the seal is under more immediate stress. It tends to perform particularly well on boxes made with a higher proportion of recycled content, where the more porous surface can be harder for some adhesives to grip cleanly.
Acrylic adhesive
Acrylic adhesive is a resin-based compound, generally water or solvent-based during application, that bonds slightly more gradually but builds into a very stable, long-lasting seal. Its main advantage is consistency across a wider temperature range, including better performance in cold conditions, and stronger resistance to UV light and oxidation, meaning it doesn't yellow or degrade as quickly when exposed to sunlight over time.
Hot melt vs acrylic: a practical comparison
| Factor | Hot melt | Acrylic |
|---|---|---|
| Initial tack | Very fast, grips almost instantly | Slightly slower to bond fully |
| Holding strength | Higher, better for heavy or bulky boxes | Strong, but generally lower peak strength than hot melt |
| Performance on recycled board | Generally better grip on porous, recycled surfaces | Can be more variable on heavily recycled board |
| Cold weather performance | Can become less effective in low temperatures | More stable across a wider temperature range, including cold |
| Long-term storage | Can yellow or degrade faster under prolonged UV exposure | More resistant to UV and oxidation, holds up better over time |
| Best suited to | Daily dispatch, heavier boxes, fast packing environments | Cold storage, long-term sealed boxes, variable conditions |
Which should you use for standard e-commerce dispatch?
For most UK sellers sending parcels through Royal Mail, Evri, DPD or similar couriers, either adhesive type will seal a standard box reliably under normal conditions. Hot melt is the more common choice for daily, high-volume dispatch, since the fast initial tack speeds up the packing process and the higher tensile strength gives more confidence with mixed box weights without needing to think too hard about which tape to grab. If you're packing dozens or hundreds of boxes a day and want one tape that performs consistently without much thought, hot melt is a sensible default.
When acrylic is the better choice
Acrylic comes into its own in a few specific scenarios. If you're storing sealed boxes for any length of time before they're shipped or moved, acrylic's resistance to UV and oxidation means the seal stays reliable for longer, whereas hot melt can degrade or discolour over extended storage, particularly if boxes are exposed to any sunlight.
If you're packing or storing in a cold environment, an unheated warehouse, garage, or anywhere that gets genuinely cold over winter, acrylic's wider effective temperature range means more consistent adhesion than hot melt, which can struggle to bond as reliably once temperatures drop.
For businesses dealing with refrigerated or chilled goods, where boxes might be stored or handled in cold conditions as standard, acrylic is generally the more dependable option for this reason.
When hot melt is the better choice
If you're sealing heavier or bulkier boxes, particularly anything that's slightly overstuffed or awkward in shape, hot melt's higher tensile strength gives more margin for error. It's also the better option if you're using boxes with a high recycled content, since the adhesive tends to grip more reliably to that kind of surface than acrylic does.
For fast-paced packing environments where speed matters and you're sealing a high volume of boxes in a single session, the quicker initial tack of hot melt reduces the chance of a strip needing to be repositioned or reapplied, which adds up over a long packing run.
Does it matter for fragile tape or coloured tape?
The adhesive choice is independent of the print or colour on the tape. Fragile tape, coloured tape and standard clear or brown tape can all be made with either hot melt or acrylic adhesive, so the decision between the two is really about matching the adhesive to your storage and packing conditions, separate from which finish or print you choose for presentation or handling warnings.
Can you mix both in one operation?
Yes, and for some businesses this is the most sensible approach. Using hot melt as the everyday workhorse tape for general dispatch, and keeping a roll of acrylic on hand for anything going into longer-term storage or being packed in a colder part of the warehouse, gives you the benefit of each without compromising on either. This is more relevant for businesses with varied packing needs than for someone sending a consistent type of parcel day in, day out, where settling on one adhesive type is simpler and perfectly adequate.
A simple way to decide
If you're not sure which to choose, ask two questions: is the box going to sit in storage for any length of time before it's sent or moved, and is it being packed or stored somewhere that gets cold? If the answer to either is yes, acrylic is the safer choice. If you're sealing and dispatching boxes quickly in a typical indoor environment, hot melt's fast tack and strong hold make it the more practical everyday option.
You can browse our full range of packaging tape, including clear, brown, fragile and kraft paper options, on our packaging tape page. If you're unsure which adhesive suits your specific storage or dispatch setup, get in touch and we can help you work out the right choice.
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