2:1 Heat Shrink Tubing 3.5mm–6.5mm | 7 Colors | Wire Wrap Sleeving
2:1 Heat Shrink Tubing 3.5mm–6.5mm | 7 Colors | Wire Wrap Sleeving
2:1 Heat Shrink Tubing 3.5mm–6.5mm | 7 Colors | Wire Wrap Sleeving
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2:1 Heat Shrink Tubing 3.5mm–6.5mm | 7 Colors | Wire Wrap Sleeving2:1 Heat Shrink Tubing 3.5mm–6.5mm | 7 Colors | Wire Wrap Sleeving2:1 Heat Shrink Tubing 3.5mm–6.5mm | 7 Colors | Wire Wrap Sleeving

2:1 Heat Shrink Tubing 3.5mm–6.5mm | 7 Colors | Wire Wrap Sleeving

HomeDIYer
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By HomeDIYer®

Price:
$2.71 USD
Stock:
In stock (500 units), ready to be shipped

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Description

 

Heat Shrink Tubing That Actually Stays Put — Reliable Wire Protection from 3.5mm to 6.5mm

Whether you're a hobbyist rewiring a vintage amp, an auto technician splicing a harness, or a maker bundling sensor cables on a weekend project, loose or exposed wire connections are a constant headache. Bare splices corrode, tape unravels, and poorly insulated joints fail at the worst moment. What you need is a clean, durable sleeve that conforms tightly and stays there.

This 2:1 heat shrink tubing is available in seven expanded diameters — 3.5mm (≈0.138"), 4mm (≈0.157"), 4.5mm (≈0.177"), 5mm (≈0.197"), 5.5mm (≈0.217"), 6mm (≈0.236"), and 6.5mm (≈0.256") — and comes in lengths of 1M, 5M, 10M, 20M, and 50M. Made from polyolefin, it shrinks to approximately half its listed diameter when heated to around 120°C (248°F). Seven color options — White, Red, Green, Blue, Clear, Yellow, and Black — make color-coded wiring organization straightforward.

Typical use cases include automotive wire splice insulation, DIY electronics cable management, marine and outdoor wiring protection, and RC hobby wire bundling. The clear variant is especially useful when you need to inspect the connection underneath without removing the sleeve — a common need in prototype electronics and color-coded heat shrink wire labeling workflows.

ℹ️ Compatibility Note: This tubing fits standard wire gauges typically ranging from AWG 10–20 depending on the diameter selected. Verify your wire's outer diameter before ordering. See the size guide in the FAQ below.

✅ Key Features of These Heat Shrink Tubing Sleeves

  • 🔥2:1 Shrink Ratio — Shrinks to approximately half its expanded diameter, creating a snug, form-fitting seal around wires, connectors, and splices without bunching or slipping.
  • 🎨7 Color Options — White, Red, Green, Blue, Clear, Yellow, and Black allow color-coded wire identification, making multi-conductor cable management and circuit tracing significantly faster.
  • 📏Wide Diameter Range — Seven sizes from 3.5mm to 6.5mm cover a broad range of wire gauges and connector bodies, reducing the need to stock multiple separate products for different jobs.
  • 🔌Polyolefin Construction — Offers good resistance to moisture, mild chemicals, and abrasion, making this heat shrink wire sleeving suitable for both indoor electronics and light outdoor or automotive applications.
  • 📦Flexible Length Options — Available in 1M, 5M, 10M, 20M, and 50M cuts so you can buy exactly what a single repair needs or stock up for ongoing projects without waste.
  • 👁️Clear Variant for Inspection — The clear color option lets you visually verify the underlying connection or label without cutting the sleeve — useful in prototype builds and color-coded heat shrink wire labeling setups.

📐 Technical Specifications — Heat Shrink Tubing

Product Type Polyolefin Heat Shrink Tubing
Shrink Ratio 2:1
Available Sizes (Expanded Diameter) 3.5mm (≈0.138") / 4mm (≈0.157") / 4.5mm (≈0.177") / 5mm (≈0.197") / 5.5mm (≈0.217") / 6mm (≈0.236") / 6.5mm (≈0.256")
Available Colors White, Red, Green, Blue, Clear, Yellow, Black
Available Lengths 1M / 5M / 10M / 20M / 50M
Activation Temperature Typically ~90°C (194°F); full shrink at ~120°C (248°F)
Material Polyolefin
Recommended Heat Source Heat gun (low to medium setting)
Suitable Applications Automotive wiring, electronics, marine, RC hobby, DIY repairs
Wall Thickness (post-shrink) See variant options
Operating Temperature Range Contact us to confirm
Voltage Rating Contact us to confirm
⚠️ Sizing Tip: Always measure the outer diameter of your wire or connector before selecting a size. The listed diameter is the expanded (pre-shrink) size. After heating, the tubing shrinks to approximately half that value.

❓ Frequently Asked Questions

How do I choose the right diameter of heat shrink tubing?

Measure the outer diameter of the wire or connector before shrinking. Choose a tubing size whose expanded diameter is at least 20% larger than the object. With a 2:1 shrink ratio, the tubing will shrink to approximately half its listed diameter — for example, 6mm tubing shrinks to roughly 3mm. When in doubt, size up one step.

What temperature is needed to shrink this tubing?

Polyolefin heat shrink tubing generally activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun set to low or medium is typically sufficient. Avoid open flames, which can scorch or unevenly shrink the tubing.

Can this heat shrink tubing be used outdoors?

Standard polyolefin heat shrink tubing generally provides good resistance to moisture, UV exposure, and mild chemicals, making it suitable for many outdoor applications. For prolonged submersion or extreme UV environments, an adhesive-lined variant is typically recommended.

Is this tubing compatible with automotive wiring?

Yes. Heat shrink tubing in the 3.5mm–6.5mm range is commonly used in automotive wiring harnesses, connector insulation, and splice protection. It is generally compatible with standard automotive wire gauges in that diameter range.

What is the difference between 2:1 and 3:1 shrink ratio?

A 2:1 ratio means the tubing shrinks to half its original diameter. A 3:1 ratio shrinks to one-third, offering a tighter fit over irregular shapes or larger connectors. For standard wire insulation and bundling, 2:1 is typically sufficient and is the most widely used option.

How do I convert the diameter sizes to inches?

Here are approximate conversions for the expanded (pre-shrink) diameters:

  • 3.5mm ≈ 0.138"
  • 4mm ≈ 0.157"
  • 4.5mm ≈ 0.177"
  • 5mm ≈ 0.197"
  • 5.5mm ≈ 0.217"
  • 6mm ≈ 0.236"
  • 6.5mm ≈ 0.256"
Can I use a lighter instead of a heat gun?

While a lighter can technically shrink the tubing, it is generally not recommended. Open flames produce uneven heat and can scorch, melt, or discolor the tubing. A heat gun or even a hair dryer on high heat provides more consistent, controlled results.

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

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