Heat Shrink Tubing 2:1 — Reliable Wire Insulation for Every Gauge
Whether you're repairing automotive wiring, organizing a home electrical panel, or finishing a DIY electronics project, loose or exposed wire ends are a constant frustration. Electricians, hobbyists, and makers all need a fast, clean way to insulate splices, protect terminals, and color-code circuits without bulky tape or messy liquid insulation.
This heat shrink tubing is made from flame-retardant polyolefin and is available in 18 diameters ranging from φ0.6mm (≈0.024") to φ10mm (≈0.39"), with a 2:1 shrink ratio. Each listing offers 1-meter and 5-meter lengths in seven colors — Black, White, Red, Green, Yellow, Blue, and Transparent — so you can match the right size and color to any job without buying a full assortment kit.
Typical use cases include automotive wire harness repair, speaker and amplifier wiring, RC model electronics, home appliance cord protection, and color-coded circuit identification in control panels. The tubing slides over wire bundles, terminals, or solder joints and shrinks snugly with a heat gun in seconds.
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Compatibility: Fits standard copper and aluminum wire, solder joints, crimp terminals, and small connectors. Shrink ratio 2:1 — recovered diameter is approximately half the listed expanded diameter. Verify your wire OD before ordering.
✅ Key Features of These Heat Shrink Tubing Sleeves
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🔥2:1 Shrink Ratio — Recovers to approximately half its expanded diameter, creating a firm, uniform grip around wire insulation, solder joints, and crimp connectors.
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🛡️Flame-Retardant Polyolefin — Self-extinguishing material resists ignition and provides reliable electrical insulation for automotive, marine, and household wiring repairs.
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📏18 Diameter Options — Covers φ0.6mm through φ10mm in 0.5mm increments, accommodating wire gauges from 28 AWG down to 6 AWG and larger connector bodies.
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🎨7 Color Choices — Black, White, Red, Green, Yellow, Blue, and Transparent allow color-coded wire identification and polarity marking in control panels and harnesses.
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✂️Cut-to-Length Flexibility — Available in 1-meter and 5-meter rolls so you can cut exactly what you need for each splice or terminal without waste.
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🌡️Low Activation Temperature — Begins shrinking at approximately 70°C (158°F), making it compatible with standard heat guns and even careful use of a lighter for field repairs.
📐 Technical Specifications — Heat Shrink Tubing 2:1
| Material |
Polyolefin (flame-retardant) |
| Shrink Ratio |
2:1 |
| Expanded Diameter Range |
φ0.6mm – φ10mm (≈0.024" – 0.39") |
| Available Lengths |
1 Meter (≈39.4") / 5 Meter (≈196.9") |
| Colors |
Black, White, Red, Green, Yellow, Blue, Transparent |
| Activation Temperature |
Typically 70–90°C (158–194°F) |
| Full Recovery Temperature |
Typically ~120°C (248°F) |
| Operating Temperature Range |
Generally -55°C to +125°C (-67°F to +257°F) |
| Voltage Rating |
See variant options / Contact us to confirm |
| Wall Thickness (recovered) |
See variant options |
| Flame Rating |
Self-extinguishing (UL 224 equivalent, typically) |
| Recommended Tool |
Heat gun (low to medium setting) |
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Sizing tip: Always measure the outer diameter of your wire or connector before selecting a size. The listed diameter is the expanded (pre-shrink) diameter. After shrinking, the tubing recovers 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 10–20% larger than the object. After shrinking at a 2:1 ratio, the tubing will recover to roughly half its original diameter. For example, φ4mm tubing shrinks to approximately φ2mm (≈0.08"). When in doubt, size up.
What temperature is needed to shrink this tubing?
Polyolefin heat shrink tubing typically activates at around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A heat gun set to low or medium is generally sufficient. Avoid directing open flames directly on the tubing when possible to prevent scorching.
Is this heat shrink tubing flame-retardant?
Yes. Polyolefin heat shrink tubing is generally self-extinguishing and meets flame-retardant standards in most applications. It is not rated for continuous exposure to open flame, but it will not sustain combustion once the ignition source is removed in typical use.
Can I use this tubing outdoors or in wet environments?
Standard polyolefin heat shrink tubing provides basic moisture resistance and UV tolerance, making it suitable for most indoor and light outdoor applications. For fully waterproof sealing (e.g., underground splices or marine environments), consider adhesive-lined dual-wall tubing instead.
What wire gauges does each diameter fit?
As a general guide: φ0.6–1mm fits 28–24 AWG; φ1.5–2mm fits 22–20 AWG; φ2.5–3mm fits 18–16 AWG; φ3.5–5mm fits 14–12 AWG; φ5.5–8mm fits 10–8 AWG; φ9–10mm fits 6 AWG and larger connectors. Always verify by measuring the actual wire bundle outer diameter before ordering.
Does the color affect performance?
No. All color variants share the same polyolefin material and 2:1 shrink ratio. Color is used for circuit identification, polarity marking, or aesthetic organization — not for electrical performance differences. Transparent tubing allows you to see the wire or label underneath after shrinking.
Is this tubing compatible with automotive wiring?
Yes. Polyolefin heat shrink tubing is widely used in automotive wiring repairs, harness protection, and connector insulation. It is generally resistant to oils, fuels, and common automotive fluids at moderate temperatures, making it a reliable choice for under-hood and interior wiring work.
🛒 Select your color, diameter, and length above, then add to cart — ships from our US warehouse.
