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3:1Dual Wall Adhesive Lined Heat Shrink Tubing
E-FLEX®Adhesive lined heat shrink tubing is a high-performance, dual-wall heat shrinkable tubing engineered through the advanced co-extrusion of irradiated cross-linked polyolefin and a specialized hot-melt adhesive.
With a versatile 3:1 shrink ratio, it allows a single size to cover a wide range of irregular diameters and components. Upon heating, the inner adhesive liner flows to fill voids, creating a permanent, rugged, and moisture-proof seal that provides critical mechanical and environmental protection for sensitive electronics and cable transitions.
What's special about adhesive heat shrink tubing?
1.Superior Environmental Sealing: The co-extruded adhesive liner melts and flows to encapsulate complex connectors, ensuring a reliable, watertight seal against moisture and corrosion.
2.Versatile 3:1 Shrink Ratio: Easily adapts to transitions between large connectors and small cables, reducing the need for multiple inventory sizes and enhancing installation flexibility.
3.Rugged Durability: Designed for extreme environments with an operating temperature range of -45℃ to 125℃,offering excellent UV, chemical, and abrasion resistance.
4.Efficient Installation: Shrinkage begins at 70℃ and reaches full recovery at 125℃, compatible with standard heat guns or industrial tunnel furnaces.
Physical Properties
| Material | Polyolefin+hot melt adhesive |
| Shrink Ratio | 3:1 |
| Working Temperature | -45℃ ~ +125℃ |
| Rated Voltage | 600V |
| Shrinking Temperature | ≧125℃ |
| Flammability | VW-1 |
| Longitudinal Shrinkage | ±8% |
| Aging Resistance | After aging at 158℃ × 168h: tensile strength ≧7.3 MPa, elongation at break ≧100%. |
| Breakdown strength | ≧15KV/mm refers to IEC 60243 |
| Certification | ROHS |
| Standard Color | Black |
| Cutting Tool | Scissor |
| Serviceable Tool | Heat gun/tunnel furnace |
Specification
Part No
After Shrunk Size(mm)
Packing Length (m/spool)
Min.(D)
Max.(d)
W.T
Adhesive Thickness
HST-DW3-AD-2.4-BK
≥2.4
≤0.80
0.80±0.30
0.40±0.20
200
HST-DW3-AD-3.2-BK
≥3.2
≤1.00
0.90±0.30
0.40±0.20
200
HST-DW3-AD-4.8-BK
≥4.8
≤1.60
1.05±0.30
0.40±0.20
100
HST-DW3-AD-6.4-BK
≥6.4
≤2.20
1.25±0.30
0.45±0.20
100
HST-DW3-AD-7.9-BK
≥7.9
≤2.70
1.35±0.30
0.45±0.20
100
HST-DW3-AD-9.5-BK
≥9.5
≤3.20
1.45±0.30
0.50±0.20
50
HST-DW3-AD-12.7-BK
≥12.7
≤4.20
1.65±0.30
0.50±0.20
25
HST-DW3-AD-15.0-BK
≥15.0
≤5.20
1.80±0.30
0.55±0.30
25
HST-DW3-AD-19.1-BK
≥19.1
≤6.30
1.95±0.30
0.60±0.30
25
HST-DW3-AD-25.4-BK
≥25.4
≤8.50
2.00±0.40
0.60±0.30
25
HST-DW3-AD-30.0-BK
≥30.0
≤10.20
2.15±0.40
0.65±0.30
25
HST-DW3-AD-39.0-BK
≥39.0
≤13.50
2.45±0.40
0.75±0.30
25
HST-DW3-AD-50.0-BK
≥50.0
≤17.00
2.75±0.40
0.80±0.30
25
HST-DW3-AD-64.0-BK
≥64.0
≤21.00
3.05±0.40
1.05±0.30
25
HST-DW3-AD-75.0-BK
≥76.0
≤25.00
3.05±0.50
1.05±0.40
25
HST-DW3-AD-90.0-BK
≥90.0
≤30.00
3.10±0.50
1.05±0.40
25
HST-DW3-AD-100.0-BK
≥100.0
≤34.00
3.10±0.50
1.10±0.40
25
HST-DW3-AD-125.0-BK
≥125.0
≤42.00
3.15±0.50
1.10±0.40
25
Application
Due to its balance of mechanical toughness and environmental encapsulation, E-FLEX® 3:1 is widely used in critical sectors:
- Connector Back-end Sealing: Provides rugged strain relief and moisture protection at the transition between connectors and cables.
- Wire Harness Breakouts: Secures and seals multi-core cable forks against environmental ingress.
- Industrial Automation: Protects sensor leads and precision electronic components from cutting fluids, oils, and humidity.
- Transportation (Railway & Automotive): Meets the rigorous demands for vibration resistance and thermal stability in rolling stock and engine compartments.
- Outdoor Telecommunications: Long-term encapsulation for RF connectors and base station wiring exposed to harsh weather.
