2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve
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2:1 Heat Shrink Tubing — φ7mm to φ13mm Electrical Insulation Wire Sleeve

HomeDIYer
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By HomeDIYer®

Price:
$6.32 USD
Stock:
In stock (500 units), ready to be shipped

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Description

2:1 Heat Shrink Tubing — Reliable Electrical Insulation for Every Wire Job

Exposed wire splices, frayed cable ends, and unprotected connectors are a safety hazard in any electrical project — whether you're wiring a car stereo, repairing a household appliance, or building a custom electronics enclosure. This 2:1 heat shrink tubing gives DIYers, auto technicians, and electricians a fast, clean way to insulate, protect, and organize wiring without tape or messy compounds.

Each listing covers a single continuous length of tubing — available in 1M (≈3.3 ft), 2M (≈6.6 ft), 5M (≈16.4 ft), 10M (≈32.8 ft), and 20M (≈65.6 ft) rolls — in unshrunk diameters from φ7mm (≈9/32") to φ13mm (≈1/2"). The tubing is made from flame-retardant polyolefin and shrinks to approximately half its listed diameter when heat is applied, creating a snug, insulating sleeve around your wire or connector. Seven color options — Black, White, Red, Green, Yellow, Blue, and Clear — make color-coding circuits straightforward.

Typical use cases include automotive wiring harness repair, marine cable protection, home electrical DIY projects, and color-coded wire management in control panels. The clear variant is especially useful when you need to inspect the connection underneath without removing the sleeve.

ℹ️ Compatibility Note: This tubing fits wire bundles up to approximately half the listed unshrunk diameter. Measure your wire or connector OD before selecting a size. For adhesive-lined or 3:1 ratio options, see our related listings.

✅ Key Features of These 2:1 Heat Shrink Tubing Sleeves

  • 🔥2:1 Shrink Ratio — Shrinks to roughly half the unshrunk inner diameter, creating a tight, conforming fit around wires, connectors, and terminals for secure electrical insulation.
  • 🛡️Flame-Retardant Polyolefin — Made from self-extinguishing polyolefin material that meets general flame-retardant standards, reducing fire risk in automotive and household wiring applications.
  • 🎨7 Color Options — Black, White, Red, Green, Yellow, Blue, and Clear allow easy color-coded wire identification in control panels, automotive harnesses, and multi-circuit DIY builds.
  • 📏Wide Diameter Range — Available in φ7mm through φ13mm (unshrunk), covering a broad range of wire gauges and connector sizes from small signal wires to heavier power cables.
  • 💧Moisture-Resistant Sleeve — Once shrunk, the tubing forms a close-fitting barrier that resists moisture ingress, helping protect wire splices and terminals in damp or outdoor environments.
  • ✂️Cut-to-Length Flexibility — Sold in rolls from 1M to 20M so you can cut exactly what you need for each job; longer rolls offer the best value for ongoing electrical repair and cable management projects.

📐 Technical Specifications — 2:1 Heat Shrink Tubing

Product Type 2:1 Heat Shrink Tubing
Material Flame-retardant polyolefin
Shrink Ratio 2:1
Unshrunk Diameter Options φ7mm (≈9/32"), φ8mm (≈5/16"), φ9mm (≈11/32"), φ10mm (≈3/8"), φ11mm (≈7/16"), φ12mm (≈15/32"), φ13mm (≈1/2")
Shrunk Inner Diameter (approx.) ~3.5mm to ~6.5mm depending on variant
Available Lengths 1M (≈3.3 ft), 2M (≈6.6 ft), 5M (≈16.4 ft), 10M (≈32.8 ft), 20M (≈65.6 ft)
Color Options Black, White, Red, Green, Yellow, Blue, Clear
Activation Temperature Typically 90–120°C (194–248°F)
Operating Temperature Range See variant options / Contact us to confirm
Flame Retardancy Self-extinguishing (polyolefin, general standard)
Suitable Applications Automotive wiring, electrical insulation, cable management, marine, DIY electronics
Country of Origin See variant options
⚠️ Sizing Tip: Always measure the outer diameter of your wire bundle or connector before ordering. Choose an unshrunk diameter that is at least 20% larger than your measured OD to ensure the tubing slides on easily before shrinking.

❓ Frequently Asked Questions

How do I choose the right diameter for my wires?

Select a diameter that is 20–30% larger than the wire or connector you need to cover before shrinking. For example, if your wire bundle measures about 5mm, choose the φ7mm (unshrunk) option. After applying heat, it will shrink to approximately half the listed diameter — so φ7mm becomes roughly φ3.5mm shrunk.

What does 2:1 shrink ratio mean?

A 2:1 shrink ratio means the tubing will shrink to approximately half its original (unshrunk) inner diameter when heat is applied. For example, φ10mm (unshrunk) will shrink to roughly φ5mm. This ratio is the most common for general electrical insulation and wire management tasks.

Can this heat shrink tubing be used outdoors?

This tubing is generally suitable for outdoor use in dry or mildly humid environments. It provides moisture resistance once shrunk. For fully waterproof or submersed applications, we recommend using adhesive-lined heat shrink tubing instead, as the adhesive creates a more complete seal.

What temperature is needed to shrink the tubing?

Typically, a heat gun set to around 90–120°C (194–248°F) is sufficient to activate shrinkage. Move the heat gun slowly and evenly along the tubing to avoid scorching. A lighter or match can work in a pinch, but a heat gun provides more even, controlled results and is recommended for best appearance.

Is this tubing flame-retardant?

Yes. This heat shrink tubing is generally made from flame-retardant polyolefin material, which self-extinguishes when the heat source is removed. This makes it suitable for most electrical and automotive wiring applications where fire safety is a consideration.

What wire gauges does each diameter fit?

As a general guide based on the 2:1 shrink ratio:

  • φ7mm (unshrunk) — fits wire bundles up to approximately 3.5mm OD
  • φ8mm — fits up to approximately 4mm OD
  • φ9mm — fits up to approximately 4.5mm OD
  • φ10mm — fits up to approximately 5mm OD
  • φ11mm — fits up to approximately 5.5mm OD
  • φ12mm — fits up to approximately 6mm OD
  • φ13mm — fits up to approximately 6.5mm OD

Always measure your wire bundle before selecting to ensure a proper fit.

Can I cut the tubing to a custom length?

Yes. The tubing can be cut to any length with scissors or a utility knife before or after shrinking. Buying a longer roll (5M, 10M, or 20M) gives you the most flexibility for multiple projects and typically offers a lower cost per meter compared to the 1M option.

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

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