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What Is Heat Shrink Tubing? Differences from Heat Shrink Tubing and How to Choose by Application
Product Guide · Expandable Sleeving
What is Expandable Sleeving?
What is Expandable Sleeving?
Differences from Heat Shrink Tubing and How to Choose by Application
Conclusion: Expandable sleeving, with its PET braided structure, expands and contracts without heat, making it ideal for post-installation and harsh environments.
When you search for "expandable sleeving", you often find a lot of information about "heat shrink tubing", but these two products are completely different. Expandable sleeving is made of braided PET material, which expands and contracts without heat, allowing cables to be inserted afterwards. This article explains the differences between the two, as well as the reasons why expandable sleeving is chosen and its applications.
Differences Between Expandable Sleeving and Heat Shrink Tubing
Although similar in name, their materials, structures, and uses are fundamentally different.
| Expandable Sleeving (Braided Sleeving) | Heat Shrink Tubing | |
|---|---|---|
| Material | PET (Polyethylene Terephthalate) | Polyolefin, PVC, etc. |
| Structure | Braided mesh structure | Extruded cylindrical shape |
| Contraction/Expansion Mechanism | Expands and contracts at room temperature (no heat required) | Shrinks with heat (heat required) |
| Post-installation | Possible (just push in from the end) | Generally not possible |
| Sealing/Waterproofing | Low (gaps due to mesh structure) | High (tight fit after shrinking) |
| Durability/Abrasion Resistance | High (strength of PET fibers) | Depends on material |
| Flame Retardancy | UL certified products available | UL certified products available |
| Main Applications | Wire protection, harness bundling, outdoor use | Termination, insulation, waterproofing |
Basic distinction: Heat shrink tubing is suitable for sealing and insulating terminals, while expandable sleeving is suitable for wire protection, bundling, and post-installation.
5 Reasons Why PET Material is Chosen
There are reasons why expandable sleeving (PET braided sleeving) is chosen over PVC and other protective materials in harsh environments.
① Lightweight, flexible, and easy to process harnesses
Lighter and more flexible than PVC tubing, making it easy to bend and conform to complex wiring routes. Easy to install on harnesses after assembly.
② High durability and abrasion resistance
The tensile strength of PET fibers exceeds that of PVC. It can withstand long-term use in machinery with high vibration and friction, as well as in vehicle wiring.
③ High weather resistance for outdoor use
Strong against UV degradation, it is also used for wiring protection in outdoor equipment and solar power installations.
④ Low friction coefficient makes it easy to pass wires
It has a slippery property against PVC-sheathed cables, making it easy to insert and remove wires from the tubing. This is particularly advantageous for post-installation on existing wiring.
⑤ Flame retardant (UL certified products available)
If you choose UL-compliant products, they can be used for wiring inside electrical equipment where flame retardancy standards are required.
Chosen for These Applications
| Application/Environment | Why Expandable Sleeving is Chosen |
|---|---|
| Automotive harnesses | Strong against vibration and friction, post-installable, lightweight |
| Industrial machinery wire bundling | Durability, easy to attach/detach for maintenance |
| Outdoor installed equipment | Weather resistant, UV resistant for long-term stability |
| Protection of harnesses with connectors | Can be inserted afterwards without removing connectors |
| Wiring requiring color identification | Available in 9 colors for color-coded wire management |
| High-temperature environments/requiring flame retardancy | UL certified products meet safety standards |
Points for Choosing
Even within PET braided expandable sleeving, there are different types to suit various applications. Please choose based on the following 4 points.
Is post-installation required?
If you want to insert it after connectors or terminals have been attached, choose a split-type or hook-and-loop (Velcro) type for post-installation. Standard tubular types require threading from the end.
Is color identification needed?
If wire identification and management are required, products available in 9 colors (FLC) are suitable. You can choose from black, white, red, blue, yellow, green, gray, orange, and natural.
Is abrasion resistance and fraying resistance required?
In environments with high vibration and friction, choose abrasion-resistant types or fray-resistant types. Types that do not require terminal treatment can reduce installation man-hours.
Is flame retardancy/UL standard required?
For wiring inside electrical equipment or environments requiring flame retardancy standards, choose UL-compliant products (FL series).
Denka Electron's Expandable Sleeving Product Lineup
We offer a range of products tailored for specific applications, including UL-compliant products, color options, post-installation features, and abrasion resistance.
Standard · UL Certified Product
Braided Sleeving UL Type (FL)
Standard PET braided sleeving with UL certification. A classic product combining flame retardancy, durability, and weather resistance.
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UL certified, safe for use in electrical equipment wiring
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PET fiber's high abrasion resistance and durability
Color / For Identification & Management
Braided Tube Color (9 colors) [FLC]
Standard stock of 9 colors: black, white, red, blue, yellow, green, gray, orange, and natural. For wiring identification and color-coding management.
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9 standard colors in stock, available from small lots
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Ideal for wiring identification and color-coding management
Post-installation Compatible
Post-installation Compatible Braided Tube [FLMX Series]
Can be installed later on cables with connectors or terminals already attached. Slit-type and Velcro-type available.
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Can be installed without removing connectors; ideal for retrofitting existing wiring
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Easy to attach and detach for maintenance
Product Category
›
View all Braided Tubes (Shrinkable Tubes)
Summary
Difference from Heat Shrink
No Heat Required, Post-installation Possible
PET braided structure allows for room temperature expansion. Can be installed without removing connectors.
Material Strengths
Durable, Weather-resistant, Flame-retardant
Can be used in harsher environments than PVC. UL certified products available.
Product Types
Color, Post-installation, Abrasion-resistant
Wide lineup to suit various applications. Small lot stock items available.
Please feel free to contact us for size selection or sample requests.
Contact us for selection or samples of shrinkable tubes
We will propose products suitable for your application, including size, color, and post-installation compatibility.
