Dual Wall Heat Shrink Tubing with Adhesive Glue Liner

Protect, seal, and waterproof your cables and wiring with this professional-grade Dual Wall Heat Shrink Tubing. Featuring a 4:1 shrink ratio and an inner adhesive glue lining, this tubing creates a tight, moisture-resistant seal around cables, connectors, splices, and terminals — making it an essential solution for automotive, marine, electrical, and DIY wiring projects.

Available in six diameters — 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm — this flexible PE tubing accommodates a wide range of wire gauges and bundle sizes. The hot-melt adhesive inner layer flows and bonds securely to the underlying surface when heat is applied, providing superior strain relief and protecting connections from moisture, corrosion, dust, and abrasion.

Made in Mainland China.

Key Features

4:1 Shrink Ratio — shrinks to one-quarter of its original diameter for a snug, custom fit
Dual Wall Construction — outer PE shell for mechanical protection; inner hot-melt adhesive for waterproofing and bonding
6 Size Options — 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm to suit various cable diameters
Electrical Insulation — provides reliable insulation to keep connections safe and secure
Moisture & Corrosion Resistant — adhesive liner creates a barrier against water ingress and oxidation
Easy to Apply — use a heat gun or lighter; shrinks quickly and evenly
Versatile Use — suitable for automotive wiring, marine cables, electronics, outdoor installations, and more
Material: Polyethylene (PE)

Specifications

Material	PE (Polyethylene)
Shrink Ratio	4:1
Available Diameters	4mm, 6mm, 8mm, 12mm, 16mm, 20mm
Type	Dual Wall Heat Shrinkable with Adhesive Glue
Battery Required	No
Country of Origin	Mainland China

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Safety & Standards Reference

For guidance on electrical wiring safety and best practices, visit the U.S. Consumer Product Safety Commission – Electrical Safety.

Learn more: Heat-shrink tubing

Frequently Asked Questions

Q: What is the shrink ratio of this dual wall heat shrink tubing?

A: This tubing features a 4:1 shrink ratio, meaning it shrinks down to one-quarter of its original inner diameter when heat is applied. This generous ratio makes it ideal for securing irregular shapes and large cable bundles with a firm, sealed fit.

Q: Is this heat shrink tubing waterproof?

A: Yes. The dual wall design includes an inner layer of hot-melt adhesive glue that melts and flows when heat is applied, sealing the connection against moisture, water ingress, and corrosion. It is suitable for outdoor, marine, and automotive wiring applications where moisture protection is essential.

Q: What sizes are available and how do I choose the right one?

A: This tubing is available in six diameters: 4mm, 6mm, 8mm, 12mm, 16mm, and 20mm (before shrinking). Choose a size whose pre-shrink inner diameter is slightly larger than the cable or connector you need to cover — the 4:1 ratio allows for a wide range of final fit sizes after shrinking.

Q: What tool do I need to apply this heat shrink tubing?

A: A standard heat gun is the recommended tool for even, controlled shrinking. A lighter or match can also be used for small sections, but a heat gun provides more consistent results, especially for larger diameters like 16mm and 20mm.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

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