Heat Shrink Tubing 2:1 — Reliable Wire Insulation for Every Project
Whether you're rewiring a vehicle, repairing electronics, or organizing cable runs in a control panel, exposed wire ends and loose connections are a constant frustration. Poorly insulated splices fail under vibration, moisture, and heat — leading to shorts, signal loss, or worse. This 2:1 heat shrink tubing gives electricians, hobbyists, and DIYers a clean, durable solution that installs in seconds with any heat gun.
Each roll is made from flame-retardant polyolefin and shrinks to approximately half its expanded diameter when heat is applied. Available in three colors — Black, Red, and Clear — and 22 sizes ranging from 0.6mm (≈0.024") to 30mm (≈1.18"). Roll lengths range from 50 meters (≈164 ft) for larger diameters up to 400 meters (≈1,312 ft) for the finest sizes, giving you bulk coverage for professional or workshop use.
Typical applications include automotive wiring harness repair, marine cable protection, PCB and electronics insulation, and color-coded wire identification in control panels. The clear variant is especially useful for quality-control inspection or anywhere you need to see the connection underneath the sleeve.
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Compatibility: Fits standard round wire, cables, and terminals. Expanded inner diameter ranges from 0.6mm to 30mm — select the size closest to (but larger than) your wire's outer diameter. Works with heat guns, soldering station hot-air attachments, and similar tools.
✅ Key Features of These Heat Shrink Tubing Rolls
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🔥2:1 Shrink Ratio — Shrinks to approximately half its expanded diameter, conforming tightly around wires, connectors, and terminals for a secure, professional finish.
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🛡️Flame-Retardant Polyolefin — Self-extinguishing material provides reliable electrical insulation and resists ignition, making it suitable for automotive and marine wiring applications.
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📏22 Sizes in One Listing — From 0.6mm to 30mm, this single listing covers fine PCB wires through large power cables, eliminating the need to source from multiple suppliers.
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🎨Three Color Options — Black for general use and UV resistance, Red for positive-lead identification, and Clear for visual inspection of the underlying connection.
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📦Bulk Roll Lengths — Available in 50m, 100m, 200m, and 400m rolls depending on size, giving workshops and contractors enough material for extended runs without frequent reordering.
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💧Moisture-Resistant Sleeve — Polyolefin construction resists moisture ingress and mild chemical exposure, helping protect wire splices in engine bays, outdoor enclosures, and damp environments.
📐 Technical Specifications — Heat Shrink Tubing
| Material |
Flame-retardant polyolefin |
| Shrink Ratio |
2:1 |
| Available Colors |
Black, Red, Clear |
| Size Range (Expanded ID) |
0.6mm (≈0.024") — 30mm (≈1.18") |
| Available Sizes |
0.6, 0.8, 1, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 15, 16, 18, 20, 22, 25, 28, 30mm |
| Roll Lengths |
400m (0.6–4mm) / 200m (5–6mm) / 100m (8–20mm) / 50m (25–30mm) |
| Shrink Temperature |
Typically 120°C (248°F) full recovery |
| Operating Temperature |
See variant options / Contact us to confirm |
| Wall Thickness (post-shrink) |
See variant options |
| Voltage Rating |
Contact us to confirm |
| Packaging |
1 roll per order |
| Ships From |
US warehouse |
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Size Selection Tip: Always measure your wire's outer diameter before ordering. The listed size is the expanded (pre-shrink) inner diameter. After shrinking, the tubing will reduce to approximately half that value.
❓ Frequently Asked Questions
How do I choose the right diameter for my wire?
Measure the outer diameter of the wire or connector before shrinking. Choose a tubing size whose expanded inner diameter is at least 10–20% larger than your wire. After shrinking at a 2:1 ratio, the tubing will typically reduce to roughly half its original diameter. For example, 4mm tubing shrinks to approximately 2mm (≈0.08").
What shrink ratio does this tubing use?
This tubing uses a 2:1 shrink ratio, meaning it shrinks to approximately half its original expanded diameter when heat is applied. This is the most common ratio for general-purpose electrical insulation and wire bundling tasks.
What temperature is needed to shrink this tubing?
Generally, polyolefin heat shrink tubing begins to shrink 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 typically sufficient. Avoid open flames, which can cause uneven shrinking or scorching of the sleeve.
Can this tubing be used outdoors or in wet environments?
Standard polyolefin heat shrink tubing provides good moisture resistance and is generally suitable for light outdoor use. However, it is not waterproof or adhesive-lined. For fully waterproof applications, adhesive-lined (3:1) tubing is typically recommended. Contact us to confirm suitability for your specific environment.
Is this tubing flame-retardant?
Yes, polyolefin heat shrink tubing is generally flame-retardant and self-extinguishing in most cases. This makes it suitable for automotive wiring harness repair, marine cable protection, and electronics applications where fire safety is a consideration.
What wire gauges are compatible with each size?
As a general guide: 0.6–1mm sizes suit very fine wires (typically 28–24 AWG); 2–4mm suits 22–18 AWG; 5–10mm suits 16–10 AWG; 12–30mm suits larger cables, connectors, and terminals. Always measure your wire's outer diameter before selecting a size, as AWG-to-mm conversions vary by insulation thickness.
What is the difference between Black, Red, and Clear variants?
All three colors share the same polyolefin material and 2:1 shrink ratio. Black is the most common choice for general wiring and offers good UV resistance. Red is often used for positive leads or color-coded wire identification. Clear allows visual inspection of the wire or connection underneath, which is useful for quality control or anywhere labeling needs to remain visible.
How much tubing do I get per roll?
Roll length varies by size: smaller diameters (0.6mm–4mm) come in 400-meter (≈1,312 ft) rolls; mid-range sizes (5mm–6mm) come in 200-meter (≈656 ft) rolls; larger sizes (8mm–20mm) come in 100-meter (≈328 ft) rolls; and the largest sizes (25mm–30mm) come in 50-meter (≈164 ft) rolls. Select your preferred combination in the variant options above.
🛒 Select your color, size, and length above, then add to cart — ships from our US warehouse.
