3:1 Adhesive Dual Wall Heat Shrink Tubing – Transparent 1.6-30mm

Transparent Adhesive-Lined Dual Wall Heat Shrink Tubing — 1 Roll

Protect, insulate, and seal wires and cables with confidence using this professional-grade dual wall heat shrink tubing. Featuring a 3:1 shrink ratio and an inner adhesive lining, this tube bonds tightly to a wide range of surfaces — including plastic, rubber, and metal — creating a robust, moisture-resistant seal that's ideal for demanding electrical and DIY applications. Available in inner diameters from 1.6 mm to 30 mm, this roll covers a versatile range of cable and wire sizes.

Why Choose Dual Wall Adhesive Heat Shrink Tubing?

Unlike standard single-wall tubing, dual wall construction combines an outer polyethylene (PE) shell with a hot-melt adhesive inner layer. When heated, the outer layer shrinks firmly around the cable while the adhesive melts and flows into gaps, forming a watertight, strain-relieving bond. This makes it the go-to solution for marine wiring, outdoor electrical installations, automotive harnesses, and any application requiring enhanced mechanical protection.

Key Features

• 3:1 Shrink Ratio — Accommodates irregular shapes and large diameter changes for a snug, professional finish
• Adhesive Inner Layer — Hot-melt glue bonds to plastic, rubber, and metal surfaces for a secure, sealed connection
• Transparent Design — Allows easy visual inspection of the cable or connector underneath
• Wide Diameter Range — Supplied inner diameters from 1.6 mm to 30 mm to suit most wire and cable sizes
• CE Certified — Meets European safety and performance standards
• Medium Wall Thickness — Balances flexibility with strong mechanical protection
• Broad Operating Temperature — Rated from -40°C to +125°C for both extreme cold and high-heat environments
• Material: PE (Polyethylene)

Technical Specifications

Common Applications

• Electrical wire and cable insulation & bundling
• Waterproofing connectors, splices, and terminals
• Automotive and marine wiring harness protection
• DIY electronics and hobby projects
• Industrial and outdoor cable management

Made in Mainland China.

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Frequently Asked Questions

Q: What does the 3:1 ratio mean for this dual wall heat shrink tubing?

A: A 3:1 shrink ratio means the tubing can shrink down to one-third of its original inner diameter when heat is applied. For example, a tube with a 30 mm inner diameter will shrink to approximately 10 mm. This makes it ideal for applications involving irregular or large-diameter cables and connectors.

Q: How do I apply this adhesive-lined heat shrink tubing?

A: Slide the tubing over the wire, cable, or connector you want to protect. Then apply uniform heat — using a heat gun or similar tool — starting at one end and moving along the tube. The outer PE layer will shrink around the cable while the inner adhesive layer melts and forms a watertight bond. Avoid using an open flame, as it can damage the tubing.

Q: Is this heat shrink tubing waterproof?

A: Yes. The hot-melt adhesive inner layer melts during the shrinking process and flows into any gaps, creating a moisture-resistant and watertight seal. This makes it well-suited for outdoor, marine, and automotive wiring applications where protection from water and humidity is important.

Q: What is the inner diameter measurement, and how do I choose the right size?

A: All diameter sizes listed refer to the inner diameter of the tube before shrinking. Choose a size that is slightly larger than the outer diameter of the cable or connector you are covering. The 3:1 ratio gives you plenty of flexibility to accommodate a wide range of sizes within a single roll.