Quick answer: “Up to 500% stretch” means the film can be pulled out to six times its original length before it breaks. It’s the film’s upper limit, not what you’ll reach wrapping by hand, which is usually far less. The headroom still matters. A film that can stretch further stays strong at the level you actually use, covers more pallet per metre, and is less likely to tear on corners.

Stretch is one of the most quoted numbers on pallet wrap, and one of the least understood. Here’s what it means once you’re standing at a pallet with a roll in your hand, and how to get more out of it.

What the percentage measures

Stretch is how far the film can be pulled beyond its starting length. The percentage is the extra length, not the total. So 100% stretch doubles the length, 200% triples it, and 500% means one metre of film can be pulled out to six metres before it fails.

That figure comes from pulling the film under controlled conditions until it breaks. It tells you the ceiling. It doesn’t mean every turn round a pallet should reach it, and on a hand-wrapped pallet it won’t.

A quick worked example

Say you’re wrapping a pallet that needs 60 metres of film going round it once it’s on the load.

With no stretch at all, you’d use 60 metres off the roll.
At 50% stretch, each metre off the roll becomes 1.5 metres on the pallet, so you’d use 40 metres.
At 100% stretch, you’d use 30 metres.
At 200% stretch, you’d use 20 metres.

Those numbers are only an illustration, but they show why stretch matters so much to cost. The more you stretch each metre, the fewer metres you take off the roll, and the more pallets each roll wraps.

Why the ceiling matters even if you never reach it

Film that’s close to its limit is thin, weak and ready to tear. Film with plenty of headroom is still strong at the level you’re using. So a film rated to stretch a long way gives you a wider safe working range. You can pull it tighter round an awkward or heavy load without it snapping at a corner, and it keeps its grip once it’s on.

A film with a lower limit reaches that point sooner. In practice that means it tears more easily, or people wrap it loosely to avoid tearing it and then add extra turns to make up for it.

Stretch also creates holding force

When you stretch good film and wrap it round a load, it tries to pull back to its original length. That pull-back squeezes the cartons together and ties them to the pallet. It’s the main reason stretch film works at all. Film that goes on loose, without being stretched, just sits round the outside of the load and does very little.

Why hand wrapping rarely gets near the maximum

Pallet wrapping machines use powered rollers to stretch film by a set, repeatable amount. By hand, the stretch depends on how hard you pull, how fast you walk and whether you use a dispenser. Most hand-wrapped pallets use a small fraction of the film’s maximum rating. That’s normal.

What you can do is get closer to a sensible, steady level. A few things help:

Use a dispenser with a brake, which stretches the film by the same amount on every turn.
Walk at a steady pace, and lean back slightly so the film is under tension as it comes off.
Watch the film. It should visibly narrow a little as it stretches. If it goes on at full width with no change, it isn’t being stretched.
Protect sharp corners with edge boards, so you can keep the tension up without tearing.

Our guide on whether you need a hand dispenser explains how a brake helps.

How to compare films on stretch

A higher stretch rating is a real advantage, but only when it’s backed by the rest of the roll. Look at it alongside the thickness, the real weight of the roll and the recycled content, not instead of them. Two rolls with the same stretch rating can still hold very different amounts of film. Our guide on why the cheapest wrap isn’t always cheapest shows how to compare rolls properly.

FAQs

Does 500% stretch mean one roll wraps five times as many pallets?

No. It’s the most the film can stretch before breaking. By hand you’ll use much less than that, so the real gain depends on how well you stretch it.

Is it bad to stretch film all the way?

Yes. Film near its limit is thin and tears easily. Stretch it enough to see it narrow slightly and feel it pulling back, but not so far that it tears at corners.

Does thicker film stretch further?

Not necessarily. Thicker film is stronger and more puncture resistant, but stretch depends mostly on the resin and how the film is made. Our 17 and 23 micron films both stretch up to 500%.

Why does my film keep tearing when I pull it tight?

Usually because of sharp corners, too much tension on a light film, or film that’s been stored somewhere cold. Our guide on why pallet wrap keeps tearing covers the causes and fixes.

All our stretch film is rated to stretch up to 500%, in both 17 and 23 micron.

What ‘Up to 500% Stretch’ Actually Means for Your Pallet