For most UK parcels, 48mm wide packaging tape is the right default. It covers a standard box seam in a single pass, fits every common hand dispenser and holds single wall board securely. Choose paper kraft tape instead when you want the sealed parcel to travel in one recycling stream, and move up to a reinforced sealing pattern whenever the box is heavy, tall or double wall.
Tape is usually the cheapest item on the packing bench and the one most likely to cause a damage claim. A well specified box does nothing if the seam pops in a sortation machine. This guide covers what actually matters when you are choosing tape for parcel despatch: material, width, sealing pattern, application temperature and recyclability.
What packaging tape has to do
Parcel tape has three jobs. It closes the box so the flaps cannot spring open, it holds the box square so the walls carry compression load properly, and it shows tamper evidence if someone opens the parcel in transit.
Most failures come down to the second job. A box that is only lightly taped across the centre seam loses a lot of its rigidity. Under the weight of other parcels in a cage or on a pallet, the flaps flex, the corners give and the contents take the impact instead of the board.
Royal Mail's own guidance is to seal parcels securely with strong tape along all edges and openings, and to flatten and cover any sharp edges from staples or metal fastenings. You can read the full advice in the Royal Mail guide to sending fragile items.
Polypropylene tape or paper kraft tape?
These are the two options most UK sellers are actually choosing between. Both seal a box properly. They differ on feel, cost per metre and what happens at the recycling bin.
| Consideration | Polypropylene parcel tape | Paper kraft tape |
|---|---|---|
| Typical roll | 48mm x 66m | 48mm x 50m |
| Application | Fast, works in a standard dispenser gun | Best applied by hand or with a paper tape dispenser |
| Appearance | Slight sheen, sits visibly on the board | Matte, blends into brown kraft board |
| Recycling | Should be pulled off the box before it goes in the bin | Paper based, so it is far less of a contamination problem |
| Best for | High volume despatch, mixed box sizes, heavier parcels | Lower volume, plastic free packing, brown kraft presentation |
Our full range of both sits in the packaging tape collection, and the standard width options are grouped under 48mm parcel tape.
What width of packaging tape do I need?
48mm is the standard width for parcel sealing in the UK and suits almost every box you will pack. It is wide enough to bridge the centre seam with a decent bond area either side, and narrow enough to control by hand.
Narrower tapes around 25mm to 38mm are best kept for wrapping bubble wrap around an item or closing a light inner bag. They do not give enough contact area to hold a filled box square, so they are a false economy on the outer seal.
How to seal a box properly: the H seal
The H seal is the standard method and it is worth making it the habit on every parcel.
- Run one strip along the centre seam where the two outer flaps meet, from edge to edge.
- Run a second strip across each end seam, at right angles to the first, so the three strips form an H shape.
- Repeat on the base of the box before you fill it.
- Let each strip overhang the box edges by around 50mm so the tape wraps onto the side walls and grips.
For heavy or double wall boxes, add a second layer over the centre seam and run tape down both vertical corner seams as well. That takes seconds and is far cheaper than a replacement order. If you are still deciding on the box itself, our range of postal boxes lists internal dimensions and wall type for each option.
How many boxes will one roll of tape seal?
You can work this out in about thirty seconds, and it is worth doing before you place a bulk order.
Take a box measuring 300mm x 220mm x 150mm. An H seal on one face uses roughly 300mm along the centre seam plus two strips of about 220mm across the ends, so around 740mm. Seal the top and the base and you are at roughly 1.5m per parcel once you allow for overhang.
A 66m roll therefore seals somewhere in the region of 40 to 45 boxes of that size. Scale that against your weekly despatch volume and you have a realistic reorder figure rather than a guess.
Why tape lifts, and how to stop it
Tape that peels back at the corners is almost always an application problem rather than a tape problem. Four things make the difference:
- Surface condition. Recycled board carries a light dust of loose fibre. Wipe or brush the seam if boxes have been sitting in a dusty stockroom.
- Moisture. Damp board will not hold a pressure sensitive adhesive well. Store flat-packed stock off the floor and away from external doors.
- Temperature. Cold tape and cold board bond more slowly. Keep rolls indoors at working temperature rather than in an unheated garage or van overnight, especially through winter.
- Pressure. Pressure sensitive tape needs to be pressed down, not just laid on. Run your hand or the dispenser's roller firmly along the full length of every strip.
When to use warning tape instead
Warning tape is not a substitute for protection, and no courier treats a parcel more gently because of what is printed on it. What it does do is tell your own team and the receiving customer how the box should be handled at the point of opening, which is genuinely useful on boxes that must stay upright or contain glass.
Use it as a top layer over a proper seal, never as the seal itself, and combine it with real internal protection from the fragile packaging range. Our white and red warning tape comes in the same 48mm width as standard parcel tape, so it runs through the same dispenser.
Tape and recycling
This is where paper tape earns its place. According to Recycle Now, sticky tape is not recyclable and should go in the general waste bin, and loose strands should be removed from cardboard before it is recycled. Corrugated cardboard is accepted for recycling once tape, polystyrene and plastic inserts have been taken out.
For a customer standing at the recycling bin, that is one more step. A paper kraft tape removes most of the friction, which matters if you are already selling a plastic free proposition. It is a small detail, but it is the kind of detail customers notice and comment on.
Tape guns and bench speed
If you are sealing more than about twenty parcels a day, a dispenser gun pays for itself quickly. It cuts cleanly, applies even pressure along the strip and removes the fiddly business of finding the end of the roll. A universal 48mm gun takes standard core sizes, so you are not locked into one tape. Have a look at the tape dispenser guns if you are still cutting tape by hand.
One practical tip: keep a second loaded gun on the bench during peak weeks. Swapping guns is faster than reloading one mid-queue.
Getting the rest of the parcel right
Tape only works as well as the box underneath it. If you are not sure which size or wall type suits your products, the box, bag and envelope size finder will narrow it down in a couple of clicks. If you would rather talk it through, our team in Cannock is on 01543 572 776, Monday to Friday, 9am to 5pm.
