Black 2:1 Heat Shrink Tubing – 7mm to 300mm OD, 1M/2M/5M/10M Lengths

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Black 2:1 Heat Shrink Tubing – 7mm to 300mm OD, 1M/2M/5M/10M Lengths

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Width (Diameter): 7mm (Φ 4mm)

Length: 1 Meter

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$2.30 USD

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Verfügbar (500 Stück), versandbereit

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Black 2:1 Heat Shrink Tubing — Reliable Wire Protection from 7mm to 300mm OD

Exposed wire ends, bare splice joints, and unprotected connectors are a liability in any electrical project — whether you're rewiring a vehicle, building a control panel, or tidying up a home workshop. This black 2:1 heat shrink tubing gives electricians, automotive technicians, and serious DIYers a clean, durable way to insulate and protect conductors of almost any size.

Each piece is cut to your chosen length (1M, 2M, 5M, or 10M) from a continuous roll of polyolefin heat shrink tubing. The outer diameter ranges from 7mm (≈0.28") to 300mm (≈11.8"), with recovered inner diameters from approximately 4mm (≈0.16") to 191mm (≈7.5"). The 2:1 shrink ratio means the tubing reduces to roughly half its expanded diameter when heated, conforming snugly around cables, connectors, terminals, and conduit bundles.

Typical use cases include automotive wire harness repair, marine cable bundling, electrical panel wiring, and DIY electronics projects where a clean black heat shrink sleeve finish is required. The wide size range also makes it a go-to for industrial cable management and large-diameter conduit protection.

ℹ️ Compatibility Note: Select the variant whose expanded outer diameter (OD) is larger than your cable, and whose recovered inner diameter (Φ) is slightly smaller. Both values are shown in each variant name — e.g., "27mm (Φ 16mm)" means 27mm expanded OD, recovering to ~16mm ID.

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

🔥2:1 Shrink Ratio — Recovers to approximately half its expanded diameter, creating a firm, uniform grip around wires, terminals, and cable bundles without gaps or wrinkles.
📏Wide Size Range — Available in 54 outer diameter options from 7mm to 300mm, covering everything from thin signal wires to large-diameter power cables and conduit sleeves.
🛡️Polyolefin Construction — Resists moisture, mild chemicals, and UV exposure, making this black heat shrink sleeve suitable for automotive, marine, and outdoor electrical applications.
✂️Cut-to-Length Flexibility — Choose from 1M, 2M, 5M, or 10M per order. Longer rolls reduce per-meter cost for wiring harness projects and bulk cable management jobs.
⚡Electrical Insulation — Provides a continuous insulating layer over splices, connectors, and bare conductors, generally rated for low-voltage applications up to 600V.
🔧Easy Heat Activation — Shrinks evenly with a standard heat gun at approximately 120°C (248°F). No adhesives or special tools required beyond a basic heat source.

📐 Technical Specifications — Black 2:1 Heat Shrink Tubing

Product Type	Polyolefin Heat Shrink Tubing
Color	Black
Shrink Ratio	2:1
Expanded OD Range	7mm (≈0.28") – 300mm (≈11.8")
Recovered ID Range	~4mm (≈0.16") – ~191mm (≈7.5")
Available Lengths	1 Meter, 2 Meter, 5 Meter, 10 Meter
Activation Temperature	Typically ~90°C (194°F) start; full recovery ~120°C (248°F)
Voltage Rating	Typically up to 600V (low-voltage applications)
Material	Polyolefin
Flame Retardancy	See variant options / Contact us to confirm
Operating Temperature	Typically -55°C to +125°C (-67°F to +257°F)
Wall Thickness (recovered)	See variant options
Recommended Tool	Heat gun (open flame not recommended)

⚠️ Sizing Tip: Always verify the recovered inner diameter (Φ) shown in the variant name against your cable's actual outer diameter before ordering. If your cable OD is close to the recovered ID, size up one step for easier installation.

❓ Frequently Asked Questions

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

Measure the outer diameter of the object you need to cover. Choose a heat shrink tube whose recovered (inner) diameter is slightly smaller than that measurement, and whose expanded (outer) diameter is larger. For example, a 12mm OD tube recovers to approximately 7mm inner diameter — ideal for cables in the 5–7mm range. When in doubt, size up one step to make sliding the tube into position easier.

What does 2:1 shrink ratio mean?

A 2:1 shrink ratio means the tubing shrinks to approximately half its original expanded diameter when heat is applied. For example, a 50mm OD tube will recover to roughly 32mm inner diameter, conforming tightly around the cable or connector. This ratio is the most common for general-purpose wire insulation and cable bundling.

What temperature is needed to shrink this tubing?

This polyolefin heat shrink tubing generally activates at around 90°C (194°F) and fully recovers at approximately 120°C (248°F). A heat gun is the recommended tool — move it steadily along the tube to ensure even shrinkage. Avoid open flames, which can cause uneven recovery or scorching of the tubing surface.

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

Yes. Polyolefin heat shrink tubing is generally resistant to UV exposure, moisture, and mild chemicals, making it suitable for outdoor wiring, automotive wire harness repair, and marine cable management. For applications requiring a fully watertight seal (such as prolonged submersion), adhesive-lined heat shrink variants are typically recommended instead.

Is this tubing compatible with standard wire gauges and connectors?

Yes. The range covers recovered inner diameters from approximately 4mm to 191mm, accommodating everything from small signal wires (typically AWG 20–24) up to large power cables, conduit bundles, and industrial connectors. Always check the variant's inner diameter (Φ) against your cable's outer diameter before ordering to ensure a proper fit.

How much length should I order for my project?

Add 10–15% to the total run length you need to cover, to account for trimming and positioning. For a single wire repair or splice, 1M is typically sufficient. For wiring harnesses, automotive builds, or larger cable management projects, 5M or 10M rolls offer better value per meter and reduce the need for mid-run joins.

What is the voltage rating of this heat shrink tubing?

Standard polyolefin 2:1 heat shrink tubing is typically rated for up to 600V, making it suitable for most low-voltage electrical and automotive applications. For high-voltage applications above this threshold, please contact us to confirm suitability before ordering.

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

Black 2:1 Heat Shrink Tubing – 7mm to 300mm OD, 1M/2M/5M/10M Lengths

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Beschreibung

Black 2:1 Heat Shrink Tubing — Reliable Wire Protection from 7mm to 300mm OD

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

📐 Technical Specifications — Black 2:1 Heat Shrink Tubing

❓ Frequently Asked Questions

Black 2:1 Heat Shrink Tubing – 7mm to 300mm OD, 1M/2M/5M/10M Lengths

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