6:1 Thick Wall Adhesive-Lined Heat Shrink Tubing for Underground Feeder Splice Protection
S4 and S4-HA 6:1 Thick Wall Adhesive-Lined Heat Shrink Tubing for Underground Feeder Splice Protection
Why High Shrink Ratio Heat Shrink Tubing Matters
In electrical power distribution, cable splices and terminations are often exposed to moisture, soil contaminants, UV radiation, and mechanical stress. Standard heat shrink tubing may not provide sufficient sealing performance when applied over irregular shapes, connectors, lugs, or oversized cable joints.
To address these challenges, S4 6:1 Thick Wall Adhesive-Lined Heat Shrink Tubing is engineered to provide superior environmental sealing, electrical insulation, and mechanical protection, especially for applications requiring large diameter reductions and reliable moisture barriers. While S4-HA is Customized High-Adhesive Volume Design
Enhanced Adhesive Rib Technology,Better Gap Filling Capability.
What is S4 6:1 Thick Wall Adhesive-Lined Heat Shrink Tubing?
S4 is a heavy-duty polyolefin heat shrink tubing with an internal hot-melt adhesive lining. Its exceptionally high 6:1 shrink ratio allows it to recover tightly over a wide range of cable diameters and irregular geometries.
During installation, the tubing shrinks uniformly while the adhesive melts and flows into gaps and voids, creating a durable moisture-resistant seal.
Key Features
✔ High Shrink Ratio 6:1
✔ Thick Wall Construction
✔ Internal Hot Melt Adhesive
✔ Waterproof Environmental Seal
✔ Excellent Mechanical Protection
✔ Corrosion and Chemical Resistance
✔ Suitable for Irregular Shapes and Connectors
✔ Long-Term Outdoor Reliability
Technical Specifications
| Property | Value |
|---|---|
| Material | Cross-linked Polyolefin |
| Adhesive | Hot Melt Adhesive Lining |
| Shrink Ratio | 6:1 |
| Operating Temperature | -55°C to +105°C |
| Minimum Shrink Temperature | 120°C |
| Full Recovery Temperature | 135°C |
| Color | Black |
| High volume Adhesive | Optional |
| RoHS Compliant | Yes |
Available Sizes
S4 is available in several commonly used dimensions:
| As Supplied (mm) | Recovered Diameter (mm) |
|---|---|
| 19 | 3.2 |
| 33 | 5.5 |
| 55 | 9.2 |
| 76 | 12.7 |
| 115 | 19.2 |
Custom sizes and lengths are available upon request.
Ideal for Irregular Shapes
One of the major advantages of S4 tubing is its ability to accommodate significant dimensional differences.
Unlike conventional 2:1 or 3:1 heat shrink tubing, S4 can shrink tightly around:
- Mechanical connectors
- Crimp lugs
- Cable transitions
- Splice bodies
- Multi-core cable breakouts
- Non-uniform cable assemblies
This makes installation easier while reducing inventory requirements by allowing a single tubing size to cover multiple cable diameters.
The Challenge
Underground feeder (UF) cable systems are constantly exposed to:
- Moisture infiltration
- Soil contamination
- Corrosion
- Mechanical impact
- Freeze-thaw cycles
Any failure in the splice protection system can result in insulation degradation, conductor corrosion, and costly repairs.
The Solution
S4 adhesive-lined heat shrink tubing forms a robust environmental barrier around underground feeder splices.
When heated:
- The outer thick-wall tubing shrinks tightly around the splice.
- The internal adhesive melts and flows.
- Voids and air pockets are eliminated.
- A waterproof seal is created.
The result is a long-lasting protective system capable of withstanding harsh underground conditions.
Benefits
- Prevents moisture ingress
- Reduces corrosion risk
- Enhances splice reliability
- Extends service life
- Improves electrical insulation performance
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How to Contact us?
Email: Enquiry@upolymer.com Whatsapp:8615940969469