Heat Shrink Tube 40mm–90mm | 2:1 Ratio Electrical Sleeving for Wire & Cable

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Heat Shrink Tube 40mm–90mm | 2:1 Ratio Electrical Sleeving for Wire & Cable

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Color: Black

Size (Diameter): 40mm

Length: 1 Meter

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$3.93 USD

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Heat Shrink Tube 40mm–90mm — Reliable Insulation for Large-Diameter Wire & Cable

Loose wire bundles, exposed connectors, and unprotected cable splices are a liability in any electrical project — whether you're rewiring a vehicle, building a control panel, or managing cables in a marine environment. This heat shrink tube is designed for electricians, automotive technicians, DIYers, and hobbyists who need a clean, durable insulation solution for larger-diameter wiring.

Each listing covers a single length of heat shrink tubing in your chosen color, diameter, and length. Available in diameters from 40mm (≈1.57") to 90mm (≈3.54"), with lengths of 1 meter (≈39.4"), 2 meters (≈78.7"), or 5 meters (≈196.9"). Made from polyolefin with a 2:1 shrink ratio, the tubing shrinks to approximately half its original diameter when heat is applied, forming a snug, protective sleeve around cables, connectors, and terminals. Seven color options — Black, White, Red, Green, Yellow, Blue, and Transparent — support color-coded wiring systems.

Typical use cases include automotive wiring harness protection, electrical panel cable management, marine and outdoor wiring insulation, and DIY electronics projects requiring large-bore heat shrink sleeving. The transparent variant is especially useful when visual inspection of the underlying connection is needed after installation.

🔌 Compatibility: Suitable for copper, aluminum, and multi-conductor wire bundles. Works with standard heat guns. Fits connectors, terminals, and cable splices with outer diameters up to the listed tube size. Confirm your bundle diameter before ordering — see FAQ below for sizing guidance.

✅ Key Features of These Heat Shrink Tubes

📐Wide Diameter Range — Available from 40mm (≈1.57") to 90mm (≈3.54"), covering large wire bundles, thick cables, and oversized connectors that standard small-bore tubing cannot accommodate.
🔥2:1 Shrink Ratio — Shrinks to approximately half its original diameter under heat, conforming tightly to irregular shapes and providing a secure, gap-free seal around cable bundles and splices.
🎨7 Color Options — Black, White, Red, Green, Yellow, Blue, and Transparent allow color-coded wire identification and circuit organization, reducing troubleshooting time in complex wiring systems.
🌧️Moisture & Abrasion Resistance — Polyolefin construction provides resistance to moisture ingress, common automotive fluids, and surface abrasion, making it suitable for engine bay, outdoor, and marine cable management applications.
✂️Cut-to-Length Flexibility — Supplied in 1m, 2m, and 5m lengths that can be trimmed to any custom size with scissors or a utility knife, minimizing waste on varied project lengths.
⚡Electrical Insulation Performance — Designed for electrical sleeving applications, the tubing generally supports operating temperatures up to 125°C (257°F) and voltage ratings typical of low-voltage wiring systems — contact us to confirm specs for your application.

📐 Technical Specifications — Heat Shrink Tubing

Material	Polyolefin
Shrink Ratio	2:1
Available Diameters (Before Shrink)	40mm (≈1.57"), 45mm (≈1.77"), 50mm (≈1.97"), 60mm (≈2.36"), 70mm (≈2.76"), 80mm (≈3.15"), 90mm (≈3.54")
Approximate Diameter After Shrink	Typically 50% of pre-shrink diameter (e.g., 40mm → ≈20mm)
Available Lengths	1 Meter (≈39.4"), 2 Meter (≈78.7"), 5 Meter (≈196.9")
Colors	Black, White, Red, Green, Yellow, Blue, Transparent
Shrink Temperature	Typically begins at 70–90°C (158–194°F); full shrink at approx. 120°C (248°F)
Operating Temperature Range	Typically -55°C to +125°C (-67°F to +257°F) — contact us to confirm
Voltage Rating	Contact us to confirm for your application
Application Method	Heat gun recommended; avoid open flame
Quantity per Order	1 piece (single length as selected)

⚠️ Sizing Note: Always measure your wire bundle or connector outer diameter before selecting a tube size. The tube diameter listed is the pre-shrink size. For a secure fit, choose a tube that is approximately 20–30% larger than your bundle's outer diameter.

❓ Frequently Asked Questions

How do I choose the right diameter for my wires?

Measure the outer diameter of the wire bundle or connector you need to cover. Choose a heat shrink tube size that is generally 20–30% larger than that measurement before shrinking. For example, if your bundle measures 32mm, a 40mm tube typically provides a secure fit after shrinking to approximately 20mm.

What does 2:1 shrink ratio mean?

A 2:1 ratio means the tube shrinks to approximately half its original diameter when heat is applied. For example, a 40mm tube will shrink down to roughly 20mm, conforming tightly around the covered component. This ratio is standard for general-purpose electrical insulation applications.

How much heat is needed to shrink the tubing?

These tubes typically begin shrinking at around 70–90°C (158–194°F) and reach full shrink at approximately 120°C (248°F). A heat gun is recommended for even, controlled application. Move the heat gun slowly along the tube from one end to the other to avoid bubbling or uneven shrinkage. Avoid open flames, which can cause scorching.

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

Yes. The polyolefin material is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for outdoor wiring, engine bay cable management, and marine applications. For prolonged submersion or harsh chemical environments, an adhesive-lined heat shrink variant is generally recommended for a fully sealed result.

What is the voltage and temperature rating of this tubing?

Polyolefin heat shrink tubing in this size range typically supports operating temperatures from -55°C to +125°C (-67°F to +257°F). Voltage ratings vary by wall thickness and application — please contact us to confirm exact ratings for your specific use case before installation in high-voltage systems.

Which color should I choose for my project?

Color selection is commonly used for circuit identification and cable organization. Black is the most widely used for general wiring; red and blue are frequently used for positive and signal lines respectively; green is common for ground wires in some conventions; transparent allows visual inspection of the underlying wire or connector after installation. Choose based on your wiring color-coding standard or personal preference.

Can I cut the tubing to a custom length?

Yes. All lengths (1m, 2m, and 5m) can be cut to any custom size with standard scissors or a utility knife before application. Cut ends remain clean and do not fray, making it straightforward to prepare multiple pieces from a single length for batch wiring jobs.

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

Heat Shrink Tube 40mm–90mm | 2:1 Ratio Electrical Sleeving for Wire & Cable

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Description

Heat Shrink Tube 40mm–90mm — Reliable Insulation for Large-Diameter Wire & Cable

✅ Key Features of These Heat Shrink Tubes

📐 Technical Specifications — Heat Shrink Tubing

❓ Frequently Asked Questions

Heat Shrink Tube 40mm–90mm | 2:1 Ratio Electrical Sleeving for Wire & Cable

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