When you're choosing strapping, the cheapest roll on the shelf isn't always the cheapest option once you count damaged cargo, injuries and lost time. There are three broad choices for securing and bundling loads: steel banding, basic polypropylene strap, and premium composite (polyester) strapping. This guide explains where each fits and why Cordstrap composite strapping sits at the premium end — backed by facts, not marketing.
The three main options
- Steel banding: the traditional heavy-duty choice. Strong in a straight pull, but rigid, heavy and hazardous to handle.
- Polypropylene (PP) strap: the lightest-duty and cheapest option, fine for light bundling of low-weight goods where high retained tension isn't critical.
- Composite (polyester) strapping: high-strength woven polyester with a coating, engineered as a direct replacement for steel. Cordstrap's own composite range is nicknamed "synthetic steel."
Why composite beats steel banding
This isn't just a sales line — it's the reason large shippers switch. According to Cordstrap's published guidance, steel banding carries a documented set of drawbacks: low elasticity, low elongation recovery, low shock absorbency, low dynamic strength, danger to users, damage to products, separate waste disposal and heavy weight.
Composite strapping addresses each of those:
- Safer to handle: steel's razor edges and recoil cause head, eye and hand injuries. High tension can be applied to composite strap without that danger, and it's safer to cut and remove.
- Holds tension through transit: steel has very little elasticity, so sudden stops or lane changes can stretch it or fail the crimp. Composite absorbs shock, recovers, and keeps a load firmly held.
- Won't damage cargo: steel scratches powder-coated and galvanised finishes; composite is non-abrasive and needs no barrier material.
- Won't rust or stain, is lightweight, and is easier to dispose of.
- Lower total cost: it's applied with one long-life tool instead of steel's two (which wear from metal-on-metal), and can be applied by a single operator.
Cordstrap vs steel vs basic poly strap
| Factor | Cordstrap composite | Steel banding | Basic PP strap |
|---|---|---|---|
| Strength | High — up to 2,600 daN | High in straight pull | Low — light duty |
| Retained tension | Yes — recovers & holds | Poor once stretched | Loses tension over time |
| Shock absorption | Yes | Low | Some |
| Operator safety | High | Injury risk | High |
| Cargo damage / rust | None | Scratches & rusts | None |
| Certification | DNV GL certified, CTU compliant | Varies | Varies |
| Best for | Heavy, valuable or export loads | Legacy heavy bundling | Light indoor bundling |
What makes Cordstrap the premium composite
Not all composite strap is equal, and this is where Cordstrap earns its price:
- Certification: Cordstrap is DNV GL certified, AAR approved and CTU Code compliant — the standards that matter for compliant international shipping.
- Joint efficiency: the strap is engineered to work with a matched galvanised steel buckle, giving a high, consistent strap-and-buckle joint — the point where cheaper systems fail.
- Track record: Cordstrap has led one-way polyester cargo securing for over 55 years, with the largest product range on the market.
- Backed by a system: matched buckles, long-life tensioning tools and expert application support, not just a roll of strap.
Which should you buy?
For light indoor bundling of low-weight goods, basic PP strap is a fine budget choice. But for anything heavy, valuable, powder-coated, or heading into a container or onto a truck, composite strapping is the safer, more reliable and — once you count damage and labour — often cheaper choice than steel. Cordstrap sits at the premium end because it's certified, system-matched and proven. Explore the range in Strapping — from CC55 (880 daN) for lighter loads up to CC105 (2,600 daN) — paired with the matching CB-series buckle. Trade accounts get tiered pricing; email sales@nzpackaging.nz to match a grade to your load.
Not sure whether you need strapping or lashing? See our guide to Cordstrap vs Cordlash.
Frequently asked questions
Is composite strapping really as strong as steel?
For securing and bundling, yes — Cordstrap composite runs up to 2,600 daN and, unlike steel, absorbs shock and recovers its tension instead of stretching or failing at the crimp. That's why it's nicknamed "synthetic steel."
Why is Cordstrap more expensive than generic composite strap?
The premium buys certification (DNV GL, CTU compliance), a high, consistent strap-and-buckle joint, and a supported system of matched buckles and tools. The joint and retained tension are where cheaper strap tends to fail.
When is cheap polypropylene strap good enough?
For light, low-weight indoor bundling where retained tension and transit shocks aren't a concern. For heavy, valuable or export loads, step up to composite.
Will composite strapping damage my product?
No — it's non-abrasive, won't scratch powder-coated or galvanised finishes, and won't rust or stain like steel banding can.
Comparative points on steel banding and polyester strapping in this article are drawn from Cordstrap's published technical guidance. Match strap grade and buckle to your specific load — contact us for a recommendation.
