2:1 Heat Shrink Tubing — Reliable Wire Insulation for Every Electrical Project
Loose wire ends, exposed splices, and unprotected connectors are a safety hazard in any electrical setup — whether you're wiring a car stereo, repairing a lamp, or building a custom electronics project. This 2:1 heat shrink tubing gives hobbyists, auto technicians, and DIY enthusiasts a clean, professional way to insulate, protect, and organize wiring without the mess of electrical tape.
Each listing covers a single continuous length of tubing — available in 1M (≈39.4") or 5M (≈196.9") cuts — in diameters ranging from φ1mm (≈0.04") to φ50mm (≈1.97"). The tubing is made from flexible polyolefin material and shrinks to approximately half its original inner diameter when heat is applied, conforming tightly around wires, terminals, and connectors. Colors available include Brown, Orange, Purple, Grey, and Yellowish Green.
Common applications include automotive wiring harness repair, marine cable protection, home electrical DIY, RC hobby builds, and color-coded circuit identification. The wide diameter range makes it suitable for everything from fine signal wires to heavy-gauge power cables.
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Compatibility: Works with standard copper and aluminum conductors, crimp terminals, solder joints, and connector housings. Suitable for 12V automotive, low-voltage DC, and general household wiring up to typically 600V. Select your diameter based on the bare wire OD — the tubing should slide on freely before shrinking.
✅ Key Features of These 2:1 Heat Shrink Tubing Sleeves
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🔥True 2:1 Shrink Ratio — Shrinks to approximately half its original inner diameter, creating a firm, gap-free seal around wires and terminals without over-tightening or cracking.
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🎨5-Color Selection for Circuit Identification — Brown, Orange, Purple, Grey, and Yellowish Green allow color-coded wiring that follows standard electrical conventions and reduces troubleshooting time.
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📏Wide Diameter Range (φ1mm–φ50mm) — Covers fine signal wires through heavy power cables, making this heat shrink wire insulation sleeve suitable for automotive, marine, and DIY electrical projects of all scales.
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🧪Flexible Polyolefin Construction — Remains pliable after shrinking, resisting cracking in vibration-prone environments such as engine bays, tool handles, and outdoor cable runs.
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⚡Electrical Insulation & Moisture Barrier — Provides a protective layer against short circuits, abrasion, and light moisture ingress — useful for cable repair, connector sealing, and wire bundling.
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✂️Cut-to-Length Convenience — Available in 1M and 5M rolls so you can cut exactly what you need for each job, minimizing waste on small repairs or stocking up for larger wiring harness projects.
📐 Technical Specifications — Heat Shrink Tubing
| Product Type |
Polyolefin Heat Shrink Tubing |
| Shrink Ratio |
2:1 |
| Available Diameters (Pre-Shrink) |
φ1mm (≈0.04") — φ50mm (≈1.97"); see variant options |
| Available Colors |
Brown, Orange, Purple, Grey, Yellowish Green |
| Available Lengths |
1M (≈39.4") / 5M (≈196.9") |
| Material |
Polyolefin (flexible) |
| Voltage Rating |
Typically up to 600V — contact us to confirm for specific applications |
| Activation Temperature |
Typically ~90°C (194°F); full recovery at ~120°C (248°F) |
| Operating Temperature Range |
See variant options / Contact us to confirm |
| Wall Thickness (Post-Shrink) |
See variant options |
| Suitable Applications |
Automotive wiring, home electrical DIY, marine cables, RC hobby, circuit identification |
| Country of Origin |
See variant options |
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Size Selection Tip: Always measure the outer diameter of your wire or connector before ordering. Choose a pre-shrink diameter that is at least 20% larger than your wire OD so the tubing slides on easily. After shrinking, it will grip firmly at approximately half the original diameter.
❓ Frequently Asked Questions
How do I choose the right diameter for my wire?
Measure the outer diameter of your wire or connector before shrinking. Select a tubing diameter that is typically 20–30% larger than the bare wire OD so it slides on easily. After heat is applied, the tubing shrinks to approximately half its original diameter (2:1 ratio), creating a snug, secure fit. For example, a 4mm wire generally works well with 6mm or 8mm tubing.
What temperature is needed to shrink this tubing?
Standard polyolefin heat shrink tubing typically activates at around 90°C (194°F) and fully recovers at approximately 120°C (248°F). A heat gun set to low or medium is generally sufficient. Avoid open flames, which can scorch or uneven-shrink the tubing.
Can this heat shrink tubing be used outdoors?
Standard polyolefin heat shrink tubing generally offers good UV and moisture resistance for light outdoor use such as garden lighting or automotive wiring. For prolonged outdoor or marine exposure, an adhesive-lined (dual-wall) variant is typically recommended for a fully waterproof seal.
What is the voltage rating of this tubing?
Polyolefin heat shrink tubing in this category is generally rated for up to 600V in standard electrical applications. For high-voltage or industrial environments, please contact us to confirm the specific rating for your use case.
Is this tubing compatible with standard wire gauges like AWG or metric?
Yes. The diameter options (φ1mm–φ50mm) cover a wide range of wire gauges. As a general guide: φ1–2mm suits 28–22 AWG wires, φ3–6mm suits 18–12 AWG, and φ8–16mm suits heavier cables. Always measure your wire OD for the most accurate fit.
Why are there multiple colors available?
Color-coding is a common practice in electrical and DIY work to identify wire functions, phases, or circuits at a glance. Brown is often used for live/phase wires, grey for neutral, green-yellow for ground, and orange or purple for custom identification. Choosing a color helps reduce wiring errors during installation and maintenance.
What is the difference between the 1M and 5M length options?
The 1M option is ideal for small repairs, prototyping, or when you only need a short run. The 5M option offers better value per meter for larger projects, automotive wiring harnesses, or workshop stock. Both are cut from the same tubing stock.
🛒 Select your diameter, color, and length above, then add to cart — ships from our US warehouse.
