Heat Shrink Tubing 2:1 — Reliable Electrical Wire Insulation from 60mm to 210mm
Whether you're repairing a frayed automotive harness, organizing a panel build, or protecting a solder joint from vibration and moisture, finding heat shrink tubing in the right diameter shouldn't slow your project down. Electricians, hobbyists, and DIY enthusiasts alike need a consistent, easy-to-apply sleeving solution that covers everything from compact connector housings to large cable looms — without hunting across multiple suppliers.
This heat shrink tubing uses a 2:1 shrink ratio and is made from flexible polyolefin material. Each piece is sold by the meter (1m or 2m lengths) and is available in nine diameters — 60mm (≈2.36"), 70mm (≈2.76"), 80mm (≈3.15"), 90mm (≈3.54"), 100mm (≈3.94"), 120mm (≈4.72"), 150mm (≈5.91"), 180mm (≈7.09"), and 210mm (≈8.27") — plus seven color options: Black, White, Red, Green, Yellow, Blue, and Clear.
Typical use cases include automotive wire loom protection and harness repair, electrical panel wire bundling and color-coding, marine and outdoor cable management, and hobby electronics insulation over solder joints and terminals.
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Compatibility Note: Designed for standard low-voltage electrical wiring, automotive harnesses, and general cable management. Verify the recovered diameter (approximately half the listed size) fits your wire bundle before ordering. For waterproof sealing, consider adhesive-lined tubing.
✅ Key Features of These Heat Shrink Tubing Sleeves
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🔥2:1 Shrink Ratio — Recovers to approximately half its original inner diameter, providing a snug, uniform fit over wire bundles, connectors, and terminals without gaps or loose ends.
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📏Wide Diameter Range — Available from 60mm to 210mm, covering everything from mid-size connector housings to large multi-wire looms — one product line for your entire project.
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🎨7 Color Options — Black, White, Red, Green, Yellow, Blue, and Clear allow straightforward circuit color-coding and wire identification in automotive, marine, and panel wiring applications.
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🛡️Moisture & Abrasion Resistance — Polyolefin construction resists moisture ingress, mild chemicals, and physical abrasion, helping protect electrical connections in engine bays, outdoor enclosures, and under-dash installations.
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✂️Cut-to-Length Flexibility — Sold in 1-meter and 2-meter lengths so you can cut exactly what you need for each splice, loom section, or connector — reducing waste on multi-step wiring jobs.
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⚡Heat Gun Compatible — Activates evenly with a standard heat gun, making installation straightforward for electrical insulation repairs, harness builds, and cable bundling without specialized tooling.
📐 Technical Specifications — Heat Shrink Tubing 2:1 Polyolefin Sleeving
| Product Type |
Heat Shrink Tubing / Electrical Sleeving |
| Shrink Ratio |
2:1 |
| Material |
Polyolefin |
| Available Diameters (Before Shrink) |
60mm (≈2.36"), 70mm (≈2.76"), 80mm (≈3.15"), 90mm (≈3.54"), 100mm (≈3.94"), 120mm (≈4.72"), 150mm (≈5.91"), 180mm (≈7.09"), 210mm (≈8.27") |
| Recovered Diameter (After Shrink) |
Approximately 50% of listed diameter (e.g., 60mm → ~30mm) |
| Available Colors |
Black, White, Red, Green, Yellow, Blue, Clear |
| Available Lengths |
1 Meter (≈39.4"), 2 Meter (≈78.7") |
| Shrink Temperature |
Typically 70–90°C (158–194°F) activation; full recovery at ~120°C (248°F) |
| Application Tool |
Heat gun recommended |
| Typical Applications |
Automotive wiring, electrical panel builds, marine cable management, hobby electronics |
| Waterproof Rating |
Moisture resistant (standard); for waterproof sealing, use adhesive-lined tubing |
| Wall Thickness (Before Shrink) |
See variant options / Contact us to confirm |
| Voltage Rating |
Contact us to confirm |
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Sizing Tip: The diameter listed is the before-shrink inner diameter. After applying heat, the tubing will recover to approximately half that size. Always measure your wire bundle or connector and select a tubing diameter at least 20% larger than that measurement for easy installation.
❓ Frequently Asked Questions
How do I choose the right diameter for my wires?
Measure the outer diameter of the bundle or connector you need to cover, then select a tubing diameter that is generally 20–30% larger than that measurement before shrinking. For example, a 60mm tube will shrink down to approximately 30mm at a 2:1 ratio. When in doubt, size up — you can always apply more heat to achieve a tighter fit.
What does 2:1 shrink ratio mean?
A 2:1 shrink ratio means the tubing will shrink to approximately half its original inner diameter when heat is applied. For example, a 60mm (≈2.36") tube will typically recover to around 30mm (≈1.18"). This ratio is the most common standard for general electrical insulation and wire bundling applications.
How much heat is needed to shrink the tubing?
This tubing generally activates at temperatures around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A heat gun is the recommended tool. Avoid open flames, as uneven heat can cause bubbling or uneven shrinkage.
Is this heat shrink tubing suitable for outdoor or wet environments?
Standard 2:1 polyolefin heat shrink tubing provides good resistance to moisture, UV exposure, and mild chemicals, making it suitable for most outdoor wiring tasks. For fully waterproof sealing (e.g., marine or underground applications), we recommend using adhesive-lined 3:1 tubing instead.
What materials and wire types is this tubing compatible with?
This tubing is compatible with copper, aluminum, and most insulated wire types. It works well over connectors, terminals, solder joints, and cable bundles. It is generally rated for use with standard low-voltage electrical wiring, automotive harnesses, and hobby electronics.
Can I use this tubing for automotive wiring repairs?
Yes. Heat shrink tubing is widely used in automotive wiring repairs to insulate splices, protect connectors, and bundle harness wires. The larger diameters (90mm–210mm) are particularly useful for covering multi-wire looms or large connector housings in engine bays and under-dash applications.
What is the difference between the color options?
All color variants share the same electrical and mechanical properties. Color selection is typically used for color-coding wire circuits (e.g., red for positive, black for ground, yellow for signal) or for aesthetic organization in panel builds and cable management projects. The Clear option allows the underlying wire or label to remain visible after installation.
🛒 Select your diameter, color, and length above, then add to cart — ships from our US warehouse.
