Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M
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Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10MHeat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M

Heat Shrink Tubing Grey 2:1 Ratio — Ø1mm to Ø50mm, 1M–10M

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Heat Shrink Tubing Grey 2:1 — Reliable Wire Insulation for Every Job

Whether you're chasing an electrical fault under the dash, tidying up a home automation project, or protecting a splice on a boat, exposed wires and poorly insulated connections are a constant headache. Heat shrink tubing is the go-to fix for electricians, automotive technicians, and serious DIYers who need a clean, durable, and professional-looking result every time.

This grey 2:1 ratio heat shrink tubing is made from flame-retardant polyolefin and is available in 21 diameters — from Ø1mm (≈3/64") up to Ø50mm (≈2") — in cut lengths of 1 meter (≈39"), 2 meters (≈79"), 5 meters (≈197"), and 10 meters (≈394"). The 2:1 shrink ratio means each tube shrinks to approximately half its listed unshrunk diameter when heat is applied, creating a snug, protective sleeve around your wire or connector.

Typical use cases include automotive wiring harness repair, marine cable protection, PCB lead insulation, and bundling multi-conductor cables in control panels. The neutral grey color blends into most wiring environments and is widely used in industrial and automotive heat shrink tubing applications.

🔌 Compatible with standard wire gauges, terminals, connectors, and solder joints. Suitable for copper, aluminum, and multi-strand conductors. Apply heat evenly with a heat gun for best results.

✅ Key Features of These Grey 2:1 Heat Shrink Tubes

  • 🔥2:1 Shrink Ratio — Shrinks to approximately half its unshrunk diameter, providing a firm, conforming fit around wires, terminals, and connectors without gaps or loose ends.
  • 🛡️Flame-Retardant Polyolefin — Made from polyolefin material that is typically self-extinguishing, offering reliable insulation for automotive wiring repair and industrial cable management.
  • 📏21 Diameters Available — Ranging from Ø1mm to Ø50mm, this range covers everything from fine instrument wire to large-diameter cable bundling in a single product line.
  • 🌧️Moisture & Abrasion Resistance — Polyolefin construction resists moisture ingress and mechanical abrasion, making it a dependable choice for outdoor wiring protection and marine cable sleeving.
  • ✂️Cut-to-Length Flexibility — Supplied in 1M, 2M, 5M, and 10M straight lengths that can be trimmed to any size with scissors, reducing waste and giving you exactly what each job needs.
  • 🚗Wide Temperature Range — Rated for use across a broad temperature range (typically -55°C to +125°C), suitable for under-hood automotive applications, control cabinets, and outdoor electrical enclosures.

📐 Technical Specifications — Grey 2:1 Heat Shrink Tubing

Material Polyolefin (flame-retardant)
Color Grey
Shrink Ratio 2:1
Diameter Range (Unshrunk) Ø1mm – Ø50mm (≈3/64" – ≈2")
Available Lengths 1M (≈39"), 2M (≈79"), 5M (≈197"), 10M (≈394")
Shrink Temperature Typically 120°C (248°F)
Operating Temperature Typically -55°C to +125°C (-67°F to +257°F)
Flame Retardancy Self-extinguishing (polyolefin standard)
Wall Thickness (post-shrink) See variant options
Voltage Rating Contact us to confirm
Supply Format Straight cut lengths (not coiled)
⚠️ Diameter listed is the unshrunk (pre-shrink) inner diameter. After applying heat, the tubing will shrink to approximately half this value. Always verify your cable's outer diameter before ordering.

❓ Frequently Asked Questions

How do I choose the right diameter of heat shrink tubing?

Measure the outer diameter of the wire or connector you need to cover. Choose a tubing size whose unshrunk (pre-shrink) diameter is at least 10–20% larger than your cable. With a 2:1 ratio, the tubing will shrink to approximately half its listed diameter — for example, Ø6mm unshrunk shrinks to roughly Ø3mm. When in doubt, size up.

What does 2:1 shrink ratio mean?

A 2:1 ratio means the tubing will shrink to approximately half its original (unshrunk) inner diameter when heat is applied. For example, Ø10mm tubing will shrink to roughly Ø5mm. This ratio is generally suitable for most standard wire insulation and cable bundling applications.

What temperature is needed to shrink this tubing?

Polyolefin heat shrink tubing typically activates at around 70–90°C (158–194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool. Avoid open flames where possible, as uneven heat can cause uneven shrinkage or scorching.

Can this heat shrink tubing be used outdoors or in automotive applications?

Yes. Polyolefin heat shrink tubing is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for outdoor wiring, car electrical repairs, and marine environments. For highly corrosive or submerged applications, consider adhesive-lined (3:1) tubing for a waterproof seal.

Is this tubing flame-retardant?

Polyolefin heat shrink tubing is typically manufactured to be flame-retardant, meaning it will self-extinguish when the heat source is removed. It is not designed for continuous exposure to open flame. If you need confirmation for a specific safety standard, please contact us.

What is the operating temperature range?

Standard polyolefin heat shrink tubing typically operates in a range of approximately -55°C to +125°C (-67°F to +257°F), making it suitable for most automotive, industrial, and household electrical applications. Contact us to confirm if your application requires a specific rating.

Can I cut the tubing to a custom length?

Yes. The tubing is supplied in straight lengths (1M, 2M, 5M, or 10M) and can be cut to any length with scissors or a utility knife before shrinking. Cut slightly longer than needed to allow for any longitudinal shrinkage during the heating process.

🛒 Select your diameter and length above, then add to cart — ships from our US warehouse.

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