Dual Wall Adhesive Heat Shrink Tubing 4:1 – 4 to 20mm Sizes

Dual Wall Adhesive Heat Shrink Tubing – Professional Cable Protection

Keep your wiring secure, watertight, and insulated with this dual-wall heat shrink tubing with built-in adhesive glue lining. Featuring an impressive 4:1 shrink ratio, this tubing tightly conforms around irregular shapes, connectors, splices, and cable ends to create a robust, weatherproof seal every time. Available in multiple diameters — 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm — there's a perfect size for virtually every wiring task.

Made in Mainland China.

Why Choose Dual-Wall Glue-Lined Heat Shrink?

• 4:1 Shrink Ratio: Shrinks down to one-quarter of its original diameter for a snug, custom fit on cables of varying sizes.
• Inner Adhesive Glue Layer: When heated, the inner lining melts and flows to fill gaps, creating a moisture-resistant, airtight seal that single-wall tubing simply can't match.
• Electrical Insulation: Provides reliable insulation to protect cables, connectors, and splices from short circuits, abrasion, and environmental exposure.
• Wide Size Range: Six diameter options (4mm, 6mm, 8mm, 12mm, 16mm, 20mm) to cover everything from delicate wire harnesses to heavy-duty power cables.
• Durable PVC Construction: Built to withstand mechanical stress, vibration, and temperature fluctuations in both indoor and outdoor applications.
• Easy to Use: Simply slide over cable, apply heat with a heat gun or lighter, and watch it shrink to form a professional-grade sleeve in seconds.

Common Applications

• Automotive wiring harnesses and connector protection
• Marine and outdoor electrical connections
• Home and industrial electrical cable repair
• Splicing and terminating wire bundles
• Protecting cable ends from moisture, corrosion, and abrasion

Product Specifications

Related Products You May Like

• 1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino
• 1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler

For guidelines on safe electrical wiring and insulation standards, refer to the U.S. Consumer Product Safety Commission – Electrical Safety.

Frequently Asked Questions

Q: What is the difference between dual-wall and single-wall heat shrink tubing?

A: Dual-wall heat shrink tubing has an outer PVC sleeve plus an inner layer of hot-melt adhesive glue. When heat is applied, the outer layer shrinks while the inner adhesive melts and flows around the cable, creating a waterproof, airtight seal. Single-wall tubing only shrinks but does not seal against moisture — making dual-wall the preferred choice for outdoor, marine, and automotive applications.

Q: What shrink ratio does this heat shrink tubing have?

A: This dual-wall heat shrink tubing has a 4:1 shrink ratio, meaning it shrinks to one-quarter of its original inner diameter when heat is applied. This makes it highly versatile for securing cables and connectors of varying thicknesses across its available sizes (4mm, 6mm, 8mm, 12mm, 16mm, and 20mm).

Q: What tool do I use to shrink this tubing?

A: A standard heat gun is the recommended tool for best results and even shrinkage. In a pinch, a lighter or match can work for smaller diameters, but a heat gun gives you more consistent, professional results, especially with larger diameters like 16mm and 20mm.

Q: Is this tubing suitable for outdoor or marine use?

A: Yes. The inner adhesive glue layer creates a moisture-resistant seal when properly applied, making this dual-wall heat shrink tubing well suited for outdoor wiring, automotive applications, and marine electrical connections where exposure to water and humidity is a concern.