120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve
Roll over image to zoom in Click on image to zoom
120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve

120mm Black Heat Shrink Tubing 2:1 – Large Diameter Electrical Insulation Sleeve

HomeDIYer
No reviews

By HomeDIYer®

Price:
$50.12 USD
Stock:
In stock (500 units), ready to be shipped

Payment & Security

Ach Direct Debit Amazon American Express Apple Pay Bancontact Diners Club Discover Google Pay iDEAL Wero Mastercard PayPal Shop Pay USDC Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Quantity Discount Promotion
🎯 BULK DISCOUNT: Buy More, Save More!
Buy 2 Items
5% OFF
Buy 4 Items
10% OFF
Buy 6 Items
15% OFF
✅ Auto-discount • 🔄 Mix & match
Expert

DIY Expert Support

Get fitment advice & recommendations

Mon-Fri, 8:30AM-8PM
WhatsApp WhatsApp Email
⚡
24-Hour Fast Ship
🚚
Arrives in 3-14 days
🌍
Global Reach
↩️
30-Day Returns
🌱 1 tree planted with every purchase

Description

120mm Black Heat Shrink Tubing 2:1 — Reliable Large-Diameter Cable Insulation

When you're working with large cable bundles, conduit terminations, or oversized wire harnesses, finding heat shrink tubing that actually fits is a real challenge. Standard sizes fall short, leaving connections exposed and vulnerable. This 120mm black heat shrink tubing is built for exactly those large-diameter applications — giving electricians, marine technicians, and industrial maintenance crews a clean, secure insulation solution that goes on easily and shrinks down firmly.

Each piece is made from flexible polyolefin material and features a 2:1 shrink ratio, meaning the supplied inner diameter of 120mm (approximately 4.72") recovers to roughly 60mm (approximately 2.36") when heat is applied. Available in 1 Meter (≈39.4") and 2 Meter (≈78.7") lengths, this tubing provides enough coverage for large splices, pipe insulation, cable management, and bundling tasks where standard sizes simply won't do.

Typical use cases include protecting large wire harness bundles in automotive and marine builds, insulating conduit ends and cable entry points in electrical panels, and providing strain relief on heavy-gauge power cables in industrial equipment — all scenarios where a durable, large-diameter heat shrink electrical sleeve is essential.

ℹ️ Compatibility Note: This tubing fits cables and bundles with an outer diameter up to 120mm (≈4.72"). Recovered diameter is typically around 60mm (≈2.36"). Measure your bundle before ordering to ensure a proper fit.

✅ Key Features of These 120mm Heat Shrink Tubing Sleeves

  • 🔥2:1 Shrink Ratio — Shrinks to approximately half its supplied diameter, conforming snugly around large cable bundles and irregular shapes for a secure, gap-free fit.
  • 📏Large 120mm Supplied Diameter — Designed for oversized wire harnesses, conduit ends, and pipe insulation where standard heat shrink sizes are too small to be practical.
  • 🛡️Polyolefin Construction — Offers resistance to moisture, mild chemicals, and abrasion, making this large-diameter electrical sleeve suitable for both indoor and many outdoor wiring environments.
  • ⚡Electrical Insulation Performance — Provides a reliable dielectric barrier around cable splices and terminations, reducing the risk of short circuits and protecting against accidental contact.
  • ✂️Easy to Cut and Position — The tubing can be cut to any length with standard scissors or a utility knife before shrinking, giving you precise coverage for each specific connection or bundle.
  • 📦Two Length Options — Available in 1 Meter and 2 Meter lengths so you can choose the right amount for your project without paying for material you won't use.

📐 Technical Specifications — 120mm Heat Shrink Tubing

Product Type Heat Shrink Tubing / Electrical Insulation Sleeve
Supplied Inner Diameter 120mm (≈4.72")
Recovered Diameter (after shrink) Typically ~60mm (≈2.36")
Shrink Ratio 2:1
Available Lengths 1 Meter (≈39.4") / 2 Meter (≈78.7")
Color Black
Material Polyolefin
Shrink Temperature Typically 120°C (248°F) full recovery
Application Method Heat gun recommended
Compliance / Certifications Contact us to confirm
Wall Thickness (recovered) See variant options
Operating Temperature Range See variant options
⚠️ Heads up: If you need a fully waterproof seal, consider adhesive-lined (dual-wall) heat shrink tubing instead. This single-wall tubing provides excellent insulation but does not create a watertight bond on its own.

❓ Frequently Asked Questions

What diameter cable or bundle can this 120mm heat shrink tubing fit?

This tubing has a supplied inner diameter of 120mm (approximately 4.72"). With a 2:1 shrink ratio, it will shrink down to a recovered diameter of typically around 60mm (approximately 2.36"). It is suited for large cable bundles, conduit ends, pipe insulation, and similar large-diameter applications. Always measure your bundle's outer diameter before ordering to ensure a proper fit.

What does the 2:1 shrink ratio mean?

A 2:1 shrink ratio means the tubing will shrink to approximately half its original supplied diameter when heat is applied. For this 120mm tube, the recovered diameter is generally around 60mm (≈2.36"). This ratio is the most common standard for general electrical insulation and cable bundling applications.

How strong is this heat shrink tubing — can it handle mechanical stress?

Polyolefin heat shrink tubing typically offers good tensile strength and resistance to abrasion, making it suitable for protecting cable bundles from mechanical wear and minor impacts. It is not designed as a primary structural load-bearing component, but it provides reliable insulation and strain relief in most electrical and industrial wiring applications.

Can this tubing be used outdoors or in marine environments?

Standard polyolefin heat shrink tubing generally offers resistance to moisture, UV exposure, and mild chemicals, making it suitable for many outdoor and marine wiring applications. However, for fully waterproof connections — such as underwater or fully submerged use — an adhesive-lined (dual-wall) heat shrink tubing is generally recommended. Contact us to confirm suitability for your specific environment.

What temperature is needed to shrink this tubing, and what tools can I use?

Polyolefin heat shrink tubing typically begins to shrink at around 70°C–90°C (158°F–194°F) and fully recovers at approximately 120°C (248°F). A heat gun is the recommended tool for large-diameter tubing like this 120mm sleeve, as it provides even, controlled heat distribution. Open flames are generally not recommended as they can cause uneven shrinkage or scorching of the material.

Is this tubing compatible with standard electrical wiring and insulation standards?

Polyolefin heat shrink tubing is widely used in electrical, automotive, and industrial applications and is generally compatible with standard copper and aluminum conductors. For compliance with specific standards (UL, RoHS, MIL-SPEC, etc.), please contact us to confirm before ordering.

How do I choose between the 1 Meter and 2 Meter length options?

Choose based on the total length of cable or bundle you need to cover. For a single large splice or conduit end, 1 Meter is typically sufficient. For longer cable runs, multiple joints, or if you want extra material on hand for future use, the 2 Meter option offers better value. Remember to account for any overlap at connection points when estimating the length you need.

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

You may also like

Recently viewed