3:1 Adhesive Heat Shrink Tubing — PE Glue Lined, 1.6mm to 6.4mm, 7 Colors
3:1 Adhesive Heat Shrink Tubing — PE Glue Lined, 1.6mm to 6.4mm, 7 Colors
3:1 Adhesive Heat Shrink Tubing — PE Glue Lined, 1.6mm to 6.4mm, 7 Colors
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3:1 Adhesive Heat Shrink Tubing — PE Glue Lined, 1.6mm to 6.4mm, 7 Colors3:1 Adhesive Heat Shrink Tubing — PE Glue Lined, 1.6mm to 6.4mm, 7 Colors3:1 Adhesive Heat Shrink Tubing — PE Glue Lined, 1.6mm to 6.4mm, 7 Colors

3:1 Adhesive Heat Shrink Tubing — PE Glue Lined, 1.6mm to 6.4mm, 7 Colors

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By HomeDIYer®

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$2.03 USD
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In stock (500 units), ready to be shipped

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Description

 

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

Loose wire splices, corroded terminals, and exposed connectors are a constant headache for electricians, marine technicians, and automotive DIYers. Standard heat shrink tubing keeps moisture out — until it doesn't. This 3:1 adhesive heat shrink tubing goes further: a hot-melt glue liner flows into every gap as the tubing shrinks, forming a fully sealed, strain-relieved sleeve that holds up in wet, vibrating, and high-temperature environments.

Each roll is made from polyethylene (PE) with a dual-wall construction — a tough outer jacket and an inner adhesive layer. Available in six pre-shrink diameters: 1.6mm (≈1/16"), 2.4mm (≈3/32"), 3.2mm (≈1/8"), 4mm (≈5/32"), 4.8mm (≈3/16"), and 6.4mm (≈1/4"). Choose from seven colors — White, Black, Red, Yellow, Green, Blue, and Clear — and five cut lengths: 1M, 2M, 3M, 5M, and 10M.

Typical use cases include marine wiring harness sealing, automotive trailer connector repair, battery terminal protection, outdoor junction box entries, and waterproof wire splice insulation in RV and off-road builds. The 3:1 shrink ratio makes it easy to slide over bulky connectors and still achieve a tight, professional finish on smaller wire gauges.

🔌 Compatibility: Suitable for copper and aluminum wire, ring terminals, butt connectors, and most standard electrical connectors. Verify the recovered diameter is smaller than your component's OD before ordering.
⚠️ Note: Sizes listed are pre-shrink (supplied) diameters. The 3:1 ratio means the tubing recovers to approximately one-third of the listed diameter. If you are unsure, contact us to confirm the right size for your application.

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

  • 💧Waterproof Adhesive Liner — The inner hot-melt glue layer melts and flows around wires and connectors, creating a moisture-resistant seal ideal for marine wiring harness repair and outdoor electrical work.
  • 📐3:1 Shrink Ratio — Shrinks to one-third of its supplied diameter, giving you the flexibility to cover large connectors and still achieve a snug fit on smaller wire gauges — more versatile than standard 2:1 tubing.
  • 🎨7 Color Options — White, Black, Red, Yellow, Green, Blue, and Clear allow color-coded wiring identification, making circuit tracing faster and reducing errors in complex harnesses.
  • 📏6 Diameter Sizes — From 1.6mm (≈1/16") to 6.4mm (≈1/4"), covering a wide range of wire gauges and connector sizes for automotive, marine, and general electrical applications.
  • 🔥PE Dual-Wall Construction — The polyethylene outer jacket resists abrasion, UV exposure, and chemicals, while the inner adhesive layer bonds to the substrate for long-term strain relief in vibrating environments like engine bays and trailers.
  • ✂️Cut-to-Length Rolls — Available in 1M, 2M, 3M, 5M, and 10M lengths so you can buy exactly what your project needs — whether it's a single splice repair or a full wiring harness build.

📐 Technical Specifications — 3:1 Adhesive Heat Shrink Tubing

Material Polyethylene (PE) dual-wall with hot-melt adhesive liner
Shrink Ratio 3:1
Available Sizes (Pre-Shrink) 1.6mm (≈1/16") | 2.4mm (≈3/32") | 3.2mm (≈1/8") | 4mm (≈5/32") | 4.8mm (≈3/16") | 6.4mm (≈1/4")
Colors White, Black, Red, Yellow, Green, Blue, Clear
Available Lengths 1M (≈3.3 ft) | 2M (≈6.6 ft) | 3M (≈9.8 ft) | 5M (≈16.4 ft) | 10M (≈32.8 ft)
Shrink Temperature Typically activates at ~70–90°C; fully shrinks at ~120°C
Operating Temperature Range Generally -55°C to +125°C (contact us to confirm for your application)
Adhesive Type Hot-melt (thermoplastic) inner liner
Application Tool Heat gun recommended; avoid open flame
Typical Applications Marine wiring, automotive harness repair, outdoor junction sealing, battery terminals, trailer connectors
Wall Type Dual-wall (outer PE jacket + inner adhesive)
Compliance / Standards See variant options

❓ Frequently Asked Questions

How do I choose the right size heat shrink tubing?

Measure the outer diameter of the wire or connector before shrinking. Choose a tubing size whose recovered (shrunken) diameter is slightly smaller than your component. For example, 3.2mm tubing typically recovers to about 1.0mm, making it suitable for wires generally in the 1.0–2.5mm range. When in doubt, size up — you can always trim excess length.

What does 3:1 shrink ratio mean?

A 3:1 shrink ratio means the tubing shrinks to approximately one-third of its original diameter when heat is applied. This allows it to fit over larger connectors and bulkheads while still conforming tightly to smaller wire diameters — making it more versatile than standard 2:1 tubing.

What is the glue lining for?

The inner adhesive (hot-melt glue) layer melts and flows around the substrate as the tubing shrinks, creating a watertight, strain-relieving seal. This is especially important in marine, automotive, and outdoor electrical applications where moisture ingress can cause corrosion or short circuits.

Is this tubing suitable for outdoor or marine use?

Yes. The adhesive liner creates a moisture-resistant seal that generally meets the demands of outdoor, marine, and automotive environments. The PE jacket is typically rated for UV exposure and temperature ranges from approximately -55°C to +125°C, though we recommend confirming suitability for your specific application.

What temperature is needed to shrink this tubing?

This tubing generally activates at around 70–90°C and fully shrinks at approximately 120°C. A heat gun is the recommended tool. Avoid open flames, which can scorch the tubing unevenly. Move the heat gun slowly along the length for a uniform, bubble-free finish.

Can I use this for automotive wiring repairs?

Yes. Adhesive-lined heat shrink tubing is widely used for automotive wiring harness repairs, trailer connector sealing, battery terminal protection, and underhood wire splices. The glue liner provides vibration resistance and prevents moisture from wicking along the wire.

How do I convert the tubing sizes from mm to inches?

Here are approximate conversions for the available sizes:

  • 1.6mm ≈ 1/16"
  • 2.4mm ≈ 3/32"
  • 3.2mm ≈ 1/8"
  • 4mm ≈ 5/32"
  • 4.8mm ≈ 3/16"
  • 6.4mm ≈ 1/4"

These are the supplied (pre-shrink) diameters.

🛒 Select your size, color, and length above, then add to cart — ships from our US warehouse.

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