How to Choose the Right Strapping

Strapping can bundle products, reinforce cartons and help unitize pallet loads, but choosing the strongest strap on the page is not the same as choosing the right one.
Start with the load: weight, rigidity, edges, movement, settling and handling. Then match the strapping material, width, break strength, joint and application method to the job.
Start With the Load Compare Strapping Ask Packaging HERO

Start With the Load, Not the Strap

Material selection gets easier once you understand how the load behaves.
Load / Application Material to Consider Watch For
Cartons, bundles and lighter unit loads Polypropylene Elongation, long-term tension, edges and load settling
Palletized loads needing higher retained tension from a nonmetallic strap Polyester Exact break strength, joint method, tooling and edge pressure
Heavy, rigid or demanding industrial loads Steel Low elongation, sharp strap edges, corrosion exposure and safe handling
Irregular shapes or hand-tensioned bundles where flexibility is useful Polyester cord Compatible buckles, tensioning and sharp product edges
High-volume carton strapping equipment Machine-grade polypropylene or equipment-compatible strap Machine specification, core size, width, thickness and joint method
Do not select strapping from load weight alone. Two loads with the same weight can require different strapping if one is rigid and stable while the other settles, expands, has sharp edges or shifts during handling.

A Practical Strapping Selection Process

1
Decide what the strap has to accomplish
Are you closing cartons, bundling individual products, reinforcing a package or unitizing a pallet? A strap used to bundle lightweight cartons has a different job from strapping used around a heavy industrial load.
2
Look at how the load changes
Some loads remain rigid. Others compress, settle, expand or shift. The strap has to maintain useful restraint as the load behaves during storage and transportation.
3
Check the edges
Sharp product edges can damage plastic or cord strapping. Strapping itself can also damage corrugated cartons or softer products when tension is concentrated over a small area. Edge and strap guards may be part of the system.
4
Compare the actual strap specification
Material name is only the beginning. Compare width, thickness, break strength, elongation, surface style, core size and other manufacturer specifications for the exact product.
5
Choose the joint and tool with the strap
Seals, buckles, heat-sealed joints, friction-welded joints and sealless tools are not universally interchangeable. The strap, joint and equipment need to be compatible with each other.
6
Validate the complete unit load
Evaluate the finished bundle or pallet under conditions representative of how it will be stored, handled and transported. Strapping performance should be judged as part of the complete load-securement system.

Compare Strapping Materials

The right material depends on how its properties match the load.

Polypropylene Strapping

Polypropylene is a lightweight nonmetallic strapping material commonly used for cartons, bundles and compatible palletized loads. It is available in hand-grade and machine-grade constructions.
Polypropylene generally allows more elongation than polyester, which can be useful in some applications but can also mean less retained tension as a load settles. Evaluate the exact strap rather than assuming all polypropylene performs the same way.
Consider polypropylene when: the application is carton closing, bundling, lighter unitization or equipment-compatible machine strapping and the required break strength and retained tension fit the load.
Shop Polypropylene Strapping →

Polyester Strapping

Polyester strapping provides a higher-strength nonmetallic option with good recovery and tension retention. It is commonly considered for pallet loads and other applications where polypropylene does not provide the required performance.
Polyester is sometimes evaluated as an alternative to steel, but that does not mean polyester can replace steel in every application. Compare the required break strength, elongation, retained tension, load edges, environment, joint and application equipment before changing materials.
Shop Polyester Strapping →

Steel Strapping

Steel strapping provides high available break strength and low elongation for demanding loads where rigidity and limited stretch are important.
Applications may include heavy industrial products, rigid materials and loads that place demands on the strap that are not appropriate for a lighter plastic construction.
Steel also brings different handling considerations. Cut ends and released tension can create hazards, and corrosion resistance depends on the exact finish and exposure.
Shop Steel Strapping →

Polyester Cord Strapping

Polyester cord strapping uses a flexible textile-style construction that can conform around irregular products and bundles. It is commonly applied with compatible buckles and hand-tensioning equipment.
Flexibility does not eliminate edge concerns. Protect cord from cutting or abrasion where it contacts sharp products and use the buckle and tensioning method specified for the strap.
Shop Polyester Cord Strapping →

Strapping Material Comparison

Material General Profile Stretch / Recovery Common Fit Key Consideration
Polypropylene Light to moderate available strength More elongation; lower retained tension than many polyester straps Cartons, bundles, lighter pallet applications, hand or machine use Load settling and required long-term tension
Polyester Moderate to high available strength Good recovery and tension retention Pallet loads and higher-strength nonmetallic applications Exact strap specification and joint compatibility
Steel High available strength and rigidity Low elongation Heavy rigid and industrial loads Handling safety, edges, corrosion and tool compatibility
Polyester Cord Flexible textile-style construction Flexible around irregular shapes Hand-tensioned bundles and compatible irregular loads Buckle, tensioning method and edge protection

Strapping Specifications That Actually Matter

Material type alone does not tell you whether a particular strap fits the load.
Break Strength
Break strength describes the force required to break the strap under specified test conditions. It is an important comparison point, but the useful strength of the complete strapping system also depends on the joint, application tension, strap placement and load.
Strap Width
Width affects how strap force is distributed and determines compatibility with seals, buckles, tensioners, sealers and machines. A wider strap is not automatically the correct strap if the rest of the system is designed for another width.
Thickness
Thickness contributes to the construction and performance of the strap, but it should be evaluated with material, width and documented break strength rather than treated as a stand-alone strength rating.
Elongation
Elongation describes how much the strap stretches under load. Some stretch can help a strap respond to movement or shock, while too much elongation can reduce restraint as a load changes.
Recovery and Tension Retention
Recovery is the strap's ability to pull back after stretching. Tension retention describes how well useful tension remains over time. These properties matter when products compress, settle or move after the strap is applied.
Core Size
Coil core dimensions matter for carts, dispensers and strapping equipment. A strap with otherwise appropriate performance can still be the wrong product if the coil does not fit the machine or dispenser used by the operation.

The Joint Can Be the Weakest Part of the Strap

A strap's published break strength does not mean the completed loop will retain that full strength at every type of joint.
The finished connection may use:
•  Metal seals
•  Wire or plastic buckles
•  Heat-sealed joints
•  Friction-welded joints
•  Notched steel seals
•  Sealless tool joints
Use the seal, buckle or joining method specified for the material, width and equipment. Do not substitute a similar-looking seal simply because it fits over the strap.

Match Seals and Buckles to the Strap

Packaging HERO carries different seals and buckles for steel, polypropylene, polyester and cord applications. They are not one universal accessory.
Joint Component What to Verify
Steel seals Strap width and thickness, open or closed style, duty level and compatible sealer
Polypropylene seals Strap width, strap surface and compatible sealer
Polyester seals Strap width, smooth or embossed construction where applicable and required serration
Buckles Strap material, width, tensioning method and load requirement
Shop Strapping Seals & Buckles →

Hand Grade and Machine Grade Are Different Buying Decisions

Hand application
Manual applications may use a tensioner, buckle or seal system and allow the operator to move the equipment to different loads. This can fit lower-volume work, oversized loads or areas where products cannot easily be brought to a fixed machine.
Machine application
Machine-grade strapping has to match the equipment specification. Width, thickness, surface, coil dimensions and joining process can affect machine feeding and sealing.
Do not buy machine strapping by material and width alone. Confirm the strapping machine's requirements before changing coil size, thickness, surface style or supplier.

Strapping Tools Are Part of the Specification

The strap cannot be separated from the equipment used to tension, join and cut it.
Equipment Job Check Before Buying
Tensioner Applies tension to the strap Material, width, thickness and intended tension range
Sealer Crimps or notches a compatible seal Seal type, strap material and width
Combination Tool Combines multiple tensioning, joining or cutting operations Exact strap range and joint system
Cutter / Shears Cuts strap safely and cleanly Material and strap capacity
Dispenser Cart Controls and transports the coil Coil type, core dimensions and strapping material
Poly Strapping Tools Polyester Tools Steel Strapping Tools Strapping Carts

Protect the Load From the Strap

Tension that secures a load can also damage the product or package underneath it.
Strap guards and edge protectors can:
•  Spread strap pressure over a larger area
•  Help reduce carton-edge crushing
•  Help protect finished surfaces
•  Help prevent certain sharp load edges from contacting the strap directly
•  Provide a more controlled path around corners
For deeper edge-protection guidance, see How to Choose the Right Edge Protector Strength.

Strapping a Pallet Is a Load-Securement Decision

Strapping can be an important part of pallet unitization, but it should not be expected to fix a poorly built load.
Before increasing strap size or tension, review:
•  Pallet condition and dimensions
•  Carton or product overhang
•  Layer pattern and alignment
•  Gaps within the load
•  Weight distribution
•  Whether the load settles or changes shape
•  Stretch-film containment
•  Strap placement
•  Edge protection
Use Palletizing Best Practices to review the complete unit load.

Strapping vs. Stretch Film: They Do Different Jobs

Strapping and stretch film can both contribute to unit-load stability, but they apply restraint differently.
Strapping Stretch Film
Applies concentrated restraint along defined strap paths Applies distributed containment around a broader portion of the load
Useful for bundling and selected pallet-unitization needs Useful for containing palletized products and helping maintain load integrity
Can create concentrated edge pressure Creates containment force across wrapped surfaces
Some loads use one method. Others use both. The decision should be based on the load and handling environment rather than a rule that one material always replaces the other.
See the Stretch Film Guide for the other side of the load-containment decision.

More Tension Is Not Automatically Better

Strapping needs enough tension to perform its job, but excessive tension can damage the load or package.
Too much tension may contribute to:
•  Crushed carton corners
•  Deformed products
•  Damaged edges
•  Strap cutting into protective materials
•  Joint or strap stress
The objective is controlled, repeatable tension appropriate for the strap and load—not the maximum tension an operator or tool can apply.

Consider the Storage and Shipping Environment

Strapping properties can be affected by environmental exposure. Review the exact product documentation if the load will experience:
•  Outdoor storage
•  UV exposure
•  Moisture or corrosive environments
•  Temperature extremes
•  Long storage periods
•  Repeated handling or vibration
Do not assign broad weather, UV or corrosion claims to an entire material family when the exact construction, coating or formulation determines performance.

Strapping Stores Energy — Treat Cutting and Release Seriously

Tensioned strapping can move rapidly when it is cut, breaks or is released. Steel strapping also presents sharp-edge hazards during handling.
Follow the tool and strap manufacturer's instructions and establish operating procedures appropriate for your application. Depending on the material and work environment, this may include:
•  Appropriate eye and hand protection
•  Keeping personnel out of the strap-release path
•  Using cutters intended for the strap material
•  Inspecting tensioners and sealers
•  Controlling loose strap ends
•  Training operators before changing strap or equipment types

Compare Cost Per Secured Load, Not Just Cost Per Foot

Strap price is only one part of the unitization cost.
•  Strapping used per load
•  Seals or buckles
•  Tools and maintenance
•  Operator time
•  Strap guards or edge protectors
•  Equipment downtime
•  Load failures and rework
•  Damage caused by insufficient or excessive restraint
A lower-cost strap can become expensive if the operation needs more straps, additional labor or frequent re-tensioning. A higher-performance strap only creates value when its properties solve a real load-securement requirement.

Common Strapping Selection Mistakes

Choosing only by load weight
Weight matters, but load rigidity, settling, edges and handling can change the requirement.
Assuming the strongest strap is automatically best
Excess strength or rigidity does not compensate for poor application and may add cost or product damage.
Ignoring the joint
Strap, seal, buckle and joining tool have to function as a system.
Increasing tension to fix an unstable pallet
Poor stacking, pallet fit or weight distribution should be corrected at the load level.
Running strap directly over vulnerable corners
Edge or strap protection may be needed to distribute pressure.
Putting machine-grade strap into equipment without checking compatibility
Width alone is not enough; thickness, core, surface and joint requirements matter.
Assuming polyester always replaces steel
Polyester can replace steel in some applications, but the decision must be based on the actual load and required performance.

Strapping FAQs

What type of strapping should I use?
Start with the load, not just its weight. Consider rigidity, settling, sharp edges, required restraint, storage conditions and application method. Polypropylene, polyester, steel and polyester cord each have different performance profiles.
What is the difference between polypropylene and polyester strapping?
Polypropylene generally has more elongation and is commonly used for cartons, bundles and lighter-duty applications. Polyester typically provides higher available strength, better recovery and better retained tension for more demanding unit loads. Compare exact product specifications rather than choosing only by material name.
Can polyester strapping replace steel?
In some applications, yes, but not automatically. Compare break strength, elongation, retained tension, load rigidity, edge conditions, environment, joint method and equipment before changing from steel to polyester.
What does strapping break strength mean?
Break strength is the force required to break the strap under specified test conditions. It is an important specification, but the completed strapping system can also be limited by the joint, application tension, placement and load.
Do I need edge protectors when using strapping?
It depends on the load. Edge protectors or strap guards can help distribute strap force, protect carton corners and keep certain sharp load edges from damaging the strap.
Is strapping better than stretch film for pallets?
They perform different functions and may be used separately or together. Strapping applies concentrated restraint along defined paths, while stretch film provides distributed containment around the load. Choose the system around the actual pallet and handling requirements.
Can I use the same seals with polypropylene and polyester strapping?
Do not assume so. Seal design, surface and sealer requirements can vary by strap material, width and construction. Use components specified for the exact strap and tool.
How much tension should I put on strapping?
Enough tension should be applied to secure the load without damaging the package, product or strap. The appropriate level depends on the strap, tool and load, so follow the relevant equipment and strapping specifications rather than using one universal setting.

Keep Building the Load-Securement System

Strapping works with the pallet, package, edge protection and other containment materials. Use these guides when you need to evaluate more than the strap itself.
Palletizing Best Practices Load Securement Supplies Stretch Film Guide Damage Troubleshooting Packaging Terms & Glossary Resource Center
Not sure which strapping system fits your load? Tell us what you are securing, how the load behaves and how the strap will be applied. Packaging HERO can help you compare material, break strength, joints, tools and edge protection as one system.
Contact Packaging HERO Resource Center