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The definitive guide! How to use and choose adhesive-backed heat shrink tubing
Technical · Heat Shrink Tube
What is Adhesive-Lined Heat Shrink Tubing?
Adhesive-lined heat shrink tubing is heat shrink tubing with a heat-activated adhesive (hot melt) applied to its inner surface.
When heated, the tube shrinks, and at the same time, the internal adhesive melts and adheres and bonds to the covered object. Compared to regular tubing, it is characterized by significantly enhanced water resistance, sealing properties, and mechanical strength.
The Nature of the Adhesive and its Bonding Strength
The inner adhesive is formulated by each manufacturer, so the composition differs. However, the following common characteristics generally apply:
Melts at high temperatures → Cures upon cooling
The adhesive melts when heated and solidifies upon cooling, firmly bonding to the covered object.
Can adhere to a wide range of materials such as rubber, PVC, and PE
While dependent on the surface condition of the material, it offers a certain level of strength to cable jackets. It does not provide complete adhesion and can be removed.
Tips for enhancing waterproofing performance
1
Observe proper heating temperature (adhesive must melt thoroughly)
2
Remove oil and dirt from cable surface before heating (prevents poor adhesion)
3
Cover the tube slightly shorter to allow space for the adhesive to escape
4
After heating, gently squeeze the tube to spread the adhesive thoroughly
5
Wipe off excess adhesive with a cloth to maintain a clean appearance
Precautions for Use
| Caution | Details |
|---|---|
| Heating Temperature | Approx. 120℃ and up (depending on tube material) |
| Adhesive Melt-out | Overheating may cause adhesive to leak from the tube |
| Feel immediately after heating | Adhesive is soft, so pressing firmly with bare hands may cause deformation |
| Handling Excess Adhesive | After heating, it can be cleanly removed by gently wiping with a cloth |
| Storage Precautions | Avoid high temperatures and humidity, store below 25℃ |
Actual Installation Examples
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Waterproof joint treatment for buried cables
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Salt damage prevention for marine applications
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Terminal processing for automotive harnesses
Denka Electron's Adhesive-Lined Heat Shrink Tubing Products
Denka Electron offers a wide range of adhesive-lined heat shrink tubing.
✓
UL certified products
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Compatible with a wide range of cable diameters, from 3:1 to 6:1 shrink ratio
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Customizable options available, including flame retardant, chemical resistant, and transparent
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Supports small lots and short delivery times
Summary · Conclusion
Adhesive-lined heat shrink tubing is
"waterproofing" and "highly reliable insulation" is the optimal choice.
If you are unsure about product selection, please feel free to contact us.
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