Heat Shrink Tubing for Every Wire, Cable & Connection — 1mm to 210mm Diameter
Whether you're chasing a wiring fault under the dash, waterproofing a trailer harness, or bundling cables in a server rack, exposed conductors and bare splices are a liability. Heat shrink tubing is the fastest, cleanest way to restore insulation, add strain relief, and protect connections from moisture, abrasion, and vibration — without tape that unravels or zip ties that slip.
Each piece is cut from flame-retardant polyolefin tubing with a 2:1 shrink ratio. Available in diameters from 1mm (≈3/64") to 210mm (≈8.3"), in lengths of 1m (≈39"), 2m (≈79"), 4m (≈157"), 5m (≈197"), or 10m (≈394"), and in 7 colors — Black, White, Red, Green, Yellow, Blue, and Transparent. Select the exact size and color you need; no minimum order, no full-spool commitment.
Typical use cases include automotive wiring repair and wire harness protection, marine and outdoor electrical connections, DIY electronics projects and PCB wire management, and industrial cable bundling and color-coded circuit identification. The wide diameter range makes this the same tubing used by auto electricians, marine riggers, and electronics hobbyists alike.
ℹ️ Compatibility Note: This tubing uses a standard 2:1 shrink ratio and fits bare wire, soldered splices, ring terminals, butt connectors, and most cylindrical components. Choose a pre-shrink diameter at least 20% larger than the object you are covering. Transparent variants are available in select sizes — see variant options above.
✅ Key Features of These Heat Shrink Tubing Sleeves
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🔥2:1 Shrink Ratio — Recovers to approximately half its original inner diameter, creating a tight, conforming sleeve around wire splices, terminals, and cable bundles without gaps or loose ends.
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🛡️Flame-Retardant Polyolefin — The base material self-extinguishes when the heat source is removed, meeting the safety expectations of automotive wiring repair and enclosed electrical enclosures.
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📏Wide Diameter Range (1–210mm) — Covers everything from thin signal wires to large conduit bundles, so one supplier handles your entire project — from 1mm sensor leads to 210mm (≈8.3") cable looms.
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🎨7 Color Options — Black, White, Red, Green, Yellow, Blue, and Transparent allow color-coded circuit identification and phase marking in electrical panels, making troubleshooting faster and wiring diagrams easier to follow.
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💧Moisture & Abrasion Resistance — Once recovered, the tubing forms a snug barrier against water ingress, road grime, and mechanical wear — suitable for outdoor cable protection and under-hood automotive applications.
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✂️Cut-to-Length Flexibility — Available in 1m, 2m, 4m, 5m, and 10m lengths so you buy only what you need. Cut with standard scissors or a utility knife before or after shrinking.
📐 Technical Specifications — Heat Shrink Tubing
| Product Type |
Heat Shrink Tubing / Heatshrink Sleeving |
| Material |
Polyolefin (flame-retardant) |
| Shrink Ratio |
2:1 |
| Diameter Range (pre-shrink) |
Ø 1mm (≈3/64") — Ø 210mm (≈8.3") |
| Available Lengths |
1m (≈39"), 2m (≈79"), 4m (≈157"), 5m (≈197"), 10m (≈394") |
| Colors |
Black, White, Red, Green, Yellow, Blue, Transparent |
| Shrink Temperature |
Typically 120°C (248°F) full recovery |
| Operating Temperature (recovered) |
Generally -55°C to +125°C (-67°F to +257°F) |
| Voltage Rating |
See variant options / Contact us to confirm for high-voltage applications |
| Wall Thickness (recovered) |
See variant options |
| Compliance / Standards |
Contact us to confirm |
| Recommended Tool |
Heat gun (avoid open flame for even shrinkage) |
⚠️ Sizing Tip: Always measure the outer diameter of your cable or connector before ordering. The pre-shrink inner diameter should be at least 20% larger than the object. When in doubt, size up — you can always apply more heat, but you cannot un-shrink tubing.
❓ Frequently Asked Questions
How do I choose the right diameter of heat shrink tubing?
Measure the outer diameter of the cable or connector you need to cover, then choose a tubing size whose recovered (shrunk) diameter is slightly smaller than that measurement. As a general rule, the pre-shrink diameter should be at least 20% larger than the object. For example, a 4mm cable typically works well with Ø 5mm or Ø 6mm tubing. When in doubt, size up — oversized tubing won't shrink tightly enough, but you can always trim excess length.
What does 2:1 shrink ratio mean?
A 2:1 ratio means the tubing shrinks to approximately half its original inner diameter when heat is applied. For example, Ø 10mm (≈3/8") tubing will recover to roughly Ø 5mm (≈3/16"), creating a snug, protective sleeve around your cable or component. This is the most common ratio for general electrical and automotive wiring applications.
What temperature is needed to shrink this tubing?
This polyolefin heat shrink tubing generally begins to activate at around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A heat gun set to medium heat is the recommended tool. Move the gun evenly along the tubing to avoid scorching. Avoid open flames where possible, as uneven heat can cause bubbling or incomplete shrinkage.
Is this heat shrink tubing suitable for outdoor or automotive use?
Yes, in most cases. Polyolefin heat shrink tubing is generally resistant to UV exposure, moisture, road salt, and common automotive fluids, making it suitable for outdoor wiring, engine bays, trailer harnesses, and marine environments. For prolonged submersion or exposure to aggressive chemicals (fuels, solvents), confirm compatibility with your specific application before ordering.
What is the operating temperature range after shrinking?
Once recovered, polyolefin heat shrink tubing typically operates continuously between -55°C and +125°C (-67°F to +257°F). This range covers most automotive, marine, outdoor, and industrial electrical applications. For high-temperature environments such as near exhaust systems, consider a higher-rated material.
Can I use this tubing for wire splices and electrical insulation?
Yes. Heat shrink tubing is widely used to insulate wire splices, solder joints, butt connectors, and ring terminals. It provides electrical insulation, strain relief, and mechanical protection in a single step. Ensure the recovered diameter is smaller than the connector or splice to achieve a secure, gap-free fit. For high-voltage applications, contact us to confirm the voltage rating of the specific size you need.
How do I convert millimeters to inches for sizing?
Divide the millimeter value by 25.4 to get inches. Common quick conversions: 6mm ≈ 1/4" | 10mm ≈ 3/8" | 12mm ≈ 1/2" | 19mm ≈ 3/4" | 25mm ≈ 1" | 50mm ≈ 2" | 100mm ≈ 4" | 150mm ≈ 6" | 210mm ≈ 8.3". All diameter options are listed in millimeters in the variant selector above.
🛒 Select your color, diameter, and length above, then add to cart — ships from our US warehouse.
