3:1 Adhesive Glue - Lined Heat Shrink Tubing – Transparent, Waterproof, 1.6mm–50mm - HomeDIYer

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3:1 Adhesive Glue-Lined Heat Shrink Tubing – Transparent, Waterproof, 1.6mm–50mm

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Shrink ratio: 3:1

Diameter: Ø1.6mm

Packing Qty: 1m

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$2.08 USD

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3:1 Adhesive Glue-Lined Heat Shrink Tubing — Waterproof Dual-Wall Sleeve for Wiring, Marine & Automotive Use

Loose connections, corroded terminals, and exposed wire splices are some of the most common causes of electrical failures in automotive, marine, and outdoor installations. Whether you're a professional electrician, a boat owner protecting bilge wiring, or a DIYer repairing a vehicle harness, you need a sleeve that does more than just cover — it needs to seal. This 3:1 adhesive glue-lined heat shrink tubing is designed for exactly those demanding situations.

Each meter of tubing features a dual-wall construction: an outer polyolefin sleeve and an inner thermoplastic adhesive (hot-melt glue) lining. Available in 15 diameters from Ø1.6mm (≈1/16") to Ø50mm (≈2"), and in packing lengths of 1m, 2m, 5m, 10m, 20m, and 50m. The transparent finish lets you visually confirm the connection beneath the sleeve after installation. The 3:1 shrink ratio means the tubing recovers to approximately one-third of its expanded diameter, conforming tightly around irregular shapes, stepped connectors, and bundled cables.

Typical use cases include marine wire harness waterproofing, automotive battery terminal protection, underground cable splice sealing, and strain relief on industrial control wiring — all scenarios where a standard 2:1 non-adhesive sleeve simply won't hold up.

🔌 Compatible with copper, aluminum, and tinned wire; suitable for 12V–600V low-voltage wiring applications. Verify recovered diameter against your cable OD before ordering.

✅ Key Features of These 3:1 Adhesive Glue-Lined Heat Shrink Tubes

💧Waterproof Adhesive Liner — The inner hot-melt glue layer melts during shrinking and flows into gaps, curing to form a moisture-resistant, watertight seal ideal for marine and outdoor wiring.
🔍Transparent Finish — Clear polyolefin outer wall allows visual inspection of the wire or connector after installation, useful for quality checks on automotive and panel wiring.
📐3:1 Shrink Ratio — Recovers to roughly one-third of its expanded diameter, providing a tighter, more conforming fit over stepped connectors, irregular shapes, and bundled cable runs than standard 2:1 tubing.
📏15 Diameter Options — Sizes from Ø1.6mm (≈1/16") to Ø50mm (≈2") cover everything from fine instrument wire to large battery cables and hydraulic hose protection.
🔧Strain Relief & Abrasion Resistance — The recovered dual-wall sleeve adds mechanical protection against vibration fatigue and abrasion at cable entry points, connector boots, and conduit transitions.
📦Flexible Pack Quantities — Order from 1m sample lengths up to 50m bulk rolls, so you only buy what your project requires — from a single splice repair to a full wiring harness job.

📐 Technical Specifications — 3:1 Adhesive Heat Shrink Tubing

Shrink Ratio	3:1
Construction	Dual-wall (polyolefin outer + thermoplastic adhesive inner)
Color / Finish	Transparent (clear)
Available Diameters (expanded)	Ø1.6mm (1/16"), Ø2.4mm (3/32"), Ø3.2mm (1/8"), Ø4mm (5/32"), Ø4.8mm (3/16"), Ø6.4mm (1/4"), Ø7.9mm (5/16"), Ø9.5mm (3/8"), Ø12.7mm (1/2"), Ø15.4mm (≈5/8"), Ø19.1mm (3/4"), Ø25.4mm (1"), Ø30mm (≈1-3/16"), Ø39mm (≈1-1/2"), Ø50mm (2")
Packing Lengths	1m, 2m, 5m, 10m, 20m, 50m
Activation Temperature	Typically 120–135°C (248–275°F) for full adhesive flow
Operating Temperature Range	See variant options / Contact us to confirm
Voltage Rating	Typically rated for low-voltage applications up to 600V — Contact us to confirm for specific use
Outer Wall Material	Polyolefin
Inner Liner Material	Thermoplastic adhesive (hot-melt)
Application Tool	Heat gun (recommended); avoid open flame
Suitable Environments	Indoor, outdoor, marine, automotive, underground

⚠️ Size selection tip: The diameter listed is the expanded (pre-shrink) inner diameter. Your cable or connector OD should be smaller than this value. After shrinking, the recovered ID will be approximately one-third of the expanded size. If you are unsure, contact us to confirm the right size for your application.

❓ Frequently Asked Questions

How do I choose the right diameter for my wire or cable?

Measure the outer diameter of the cable or connector before shrinking. Choose a size whose expanded (pre-shrink) inner diameter is slightly larger than your cable. For example, a 6.4mm (1/4") tube fits cables typically up to about 6mm OD. After applying heat, the tube shrinks to roughly one-third of its original diameter, so the recovered diameter should be smaller than your cable for a snug, waterproof seal.

What does the 3:1 shrink ratio mean?

A 3:1 shrink ratio means the tubing shrinks to approximately one-third of its original expanded diameter when heat is applied. This is significantly more than standard 2:1 tubing, making it suitable for irregular shapes, connectors, and bundled cables where a tighter, more conforming fit is needed.

What is the glue lining and why does it matter?

The inner wall is coated with a thermoplastic adhesive (hot-melt glue). When heated, this adhesive melts and flows into gaps and around irregular surfaces, then cures to form a watertight, strain-relieving bond. This dual-wall construction is what makes glue-lined tubing suitable for marine, outdoor, and underground wiring applications.

Is this heat shrink tubing suitable for outdoor or marine use?

Yes. The adhesive liner creates a waterproof seal that generally resists moisture, salt spray, and mild chemical exposure. It is commonly used in marine wiring, outdoor electrical enclosures, and underground cable splices. For prolonged UV exposure, additional UV-resistant jacketing is generally recommended.

What temperature is needed to shrink this tubing?

Glue-lined 3:1 tubing typically begins to shrink at around 70°C (158°F) and the adhesive fully activates at approximately 120–135°C (248–275°F). A heat gun is the recommended tool. Open flames can cause uneven shrinkage or scorching and are generally not recommended.

Can I use this tubing on automotive wiring and battery terminals?

Yes. The 3:1 ratio and adhesive liner make this tubing well-suited for automotive applications including battery terminal protection, wire harness repair, and connector sealing. The transparent finish allows visual inspection of the connection after installation.

How much length do I need to order?

Add 10–20% to your measured cable length to account for trimming and positioning. For a single splice or terminal, 1m is typically sufficient. For wiring harness projects or bulk repairs, 5m, 10m, or 50m rolls offer better value per meter.

🛒 Select your diameter and packing quantity above, then add to cart — ships from our US warehouse.

3:1 Adhesive Glue-Lined Heat Shrink Tubing – Transparent, Waterproof, 1.6mm–50mm

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Beschreibung

3:1 Adhesive Glue-Lined Heat Shrink Tubing — Waterproof Dual-Wall Sleeve for Wiring, Marine & Automotive Use

✅ Key Features of These 3:1 Adhesive Glue-Lined Heat Shrink Tubes

📐 Technical Specifications — 3:1 Adhesive Heat Shrink Tubing

❓ Frequently Asked Questions

3:1 Adhesive Glue-Lined Heat Shrink Tubing – Transparent, Waterproof, 1.6mm–50mm

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