3:1 Dual-Wall Adhesive Heat Shrink Tubing 1.6mm–30mm Black
3:1 Dual-Wall Adhesive Heat Shrink Tubing 1.6mm–30mm Black
3:1 Black Dual-Wall Adhesive-Lined Heat Shrink Tubing
Protect, seal, and insulate your cables and wiring with this premium 3:1 ratio dual-wall adhesive heat shrink tubing. Featuring an inner layer of hot-melt adhesive glue and an outer PE jacket, this sleeve creates a waterproof, airtight bond around cables, connectors, and wire splices — ideal for automotive, marine, electrical, and DIY applications.
Key Features
- 3:1 Shrink Ratio — shrinks to one-third of its original diameter for a snug, secure fit on a wide range of cable sizes
- Dual-Wall Construction — outer PE wall provides mechanical protection; inner adhesive glue layer flows and seals for a waterproof, moisture-resistant finish
- Wide Diameter Range — available from 1.6 mm to 30 mm to suit everything from delicate wiring to heavy-duty cable bundles
- CE Certified — meets European safety and quality standards
- Adhesive-Lined Sleeve — inner glue layer bonds to cable jackets, preventing moisture ingress and corrosion at joints and splices
- Material: High-quality Polyethylene (PE)
- Color: Black — classic, professional-looking finish suitable for most applications
- 1 Roll Included — generous quantity for multiple projects
Common Applications
- Automotive wiring harnesses and connector sealing
- Marine and outdoor electrical cable protection
- Wire splices, solder joints, and terminal insulation
- DIY electronics and electrical repair projects
- Industrial cable management and bundling
Specifications
| Shrink Ratio | 3:1 |
| Wall Type | Dual-wall with adhesive (glue-lined) |
| Material | Polyethylene (PE) |
| Diameter Range | 1.6 mm – 30 mm |
| Color | Black |
| Certification | CE |
| Quantity | 1 Roll |
| Country of Origin | Made in China |
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Frequently Asked Questions
Q: What is the difference between 3:1 dual-wall heat shrink tubing and standard single-wall tubing?
A: Standard single-wall heat shrink tubing provides basic insulation and strain relief. This 3:1 dual-wall adhesive-lined heat shrink tubing features an additional inner layer of hot-melt glue that melts and flows when heat is applied, creating a waterproof, moisture-resistant seal around the cable or connector. The 3:1 shrink ratio also means it can accommodate a much wider range of diameters compared to the standard 2:1 ratio tubing.
Q: What tool do I need to apply this heat shrink tubing?
A: You can use a heat gun, butane torch (kept moving to avoid burning), or even a lighter for smaller diameters. A heat gun is recommended for best results as it delivers consistent, controlled heat to activate both the outer PE shrink layer and the inner adhesive glue lining evenly along the entire length of the sleeve.
Q: What diameter size should I choose for my cable?
A: Choose a heat shrink tube with a supplied (pre-shrink) inner diameter that is slightly larger than your cable or connector. After heat is applied, the tubing will shrink to approximately one-third of its original diameter. The range of 1.6 mm to 30 mm covers most common cable sizes from thin signal wires to large power cables.
Q: Is this tubing suitable for outdoor or marine use?
A: Yes. The adhesive glue inner wall creates a waterproof seal that blocks moisture, making this dual-wall heat shrink tubing well suited for outdoor wiring, marine electrical connections, automotive harnesses, and any environment where exposure to water or humidity is a concern.