Heat Shrink Tubing 2:1 Ratio Black — 30mm to 150mm Electrical Cable Sleeving

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Heat Shrink Tubing 2:1 Ratio Black — 30mm to 150mm Electrical Cable Sleeving

HomeDIYer

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By HomeDIYer®

Diameter (Unshrinked): 30mm

Length (Meter): 1 Meter

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$5.97 USD

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In stock (500 units), ready to be shipped

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Heat Shrink Tubing 2:1 Black — Reliable Electrical Insulation for Every Cable Size

Whether you're repairing a wiring harness, protecting exposed conductors, or bundling cables in a panel build, finding heat shrink tubing that actually fits large-diameter cables can be a real challenge. Electricians, automotive technicians, marine riggers, and serious DIYers all run into the same problem: standard tubing is too small, and oversized options are hard to find in useful lengths. This black 2:1 heat shrink tubing is stocked in diameters from 30mm to 150mm — covering the sizes that most hardware stores simply don't carry.

Each unit is sold as 1 meter of tubing. Available in unshrunk diameters of 30mm (≈1.2"), 35mm (≈1.4"), 40mm (≈1.6"), 45mm (≈1.8"), 50mm (≈2.0"), 60mm (≈2.4"), 70mm (≈2.8"), 80mm (≈3.1"), 90mm (≈3.5"), 100mm (≈3.9"), 120mm (≈4.7"), and 150mm (≈5.9"). Made from polyolefin, a material known for its flexibility, chemical resistance, and consistent shrink performance. The 2:1 ratio means each tube shrinks to approximately half its listed diameter when heat is applied.

Typical applications include automotive wiring harness repair and protection, electrical panel cable management and bundling, marine and RV wiring insulation, battery cable and terminal protection, and industrial conduit sleeving for large-gauge wire runs. The black finish also provides UV resistance for light outdoor use.

ℹ️ Compatibility Note: This tubing uses standard polyolefin construction and is compatible with most copper, aluminum, and stranded wire types. Shrink ratio is 2:1. For waterproof or adhesive-lined applications, please contact us before ordering.

✅ Key Features of These Heat Shrink Tubing Sleeves

🔥Consistent 2:1 Shrink Ratio — Shrinks to approximately half its unshrunk diameter, giving you a snug, uniform fit around cables, connectors, and terminals without gaps or loose ends.
📏Wide Diameter Range — Available from 30mm to 150mm unshrunk, covering small conduit bundles up to large-gauge battery cables and industrial wiring harnesses — sizes rarely found in local hardware stores.
⚡Polyolefin Construction — Polyolefin material provides solid electrical insulation, flexibility at low temperatures, and resistance to common chemicals, oils, and solvents encountered in automotive and industrial environments.
✂️Sold by the Meter — Cut to Need — Each unit is 1 meter long, so you only buy what your project requires. Add multiple units for longer runs or multi-cable jobs without paying for excess material.
🌑Black Finish with UV Resistance — The black color provides basic UV protection for light outdoor and under-hood applications, and gives a clean, professional appearance on finished cable assemblies.
🔧Heat Gun Compatible — Activates with a standard heat gun — no specialized tools required. Even shrink distribution makes it suitable for DIY electrical repairs, marine rigging, and professional panel builds alike.

📐 Technical Specifications — Heat Shrink Tubing 2:1 Black

Product Type	Heat Shrink Tubing
Shrink Ratio	2:1
Color	Black
Material	Polyolefin
Unshrunk Diameter Options	30mm, 35mm, 40mm, 45mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 120mm, 150mm
Shrunk Diameter (approx.)	15mm – 75mm (varies by size selected)
Length per Unit	1 Meter (≈39.4")
Activation Temperature	Typically ~90°C (194°F)
Full Shrink Temperature	Typically ~120°C (248°F)
Wall Thickness (shrunk)	See variant options
Voltage Rating	Contact us to confirm
Operating Temperature Range	Typically -55°C to +125°C (-67°F to +257°F)
Adhesive Lined	No (standard, non-adhesive)
Recommended Application Tool	Heat gun

⚠️ Spec Confirmation: Voltage rating and wall thickness vary by diameter. If your application has specific electrical or mechanical requirements, please contact us before ordering to confirm the right size.

❓ Frequently Asked Questions

How do I choose the right diameter for my cables?

Measure the outer diameter of your cable or bundle before shrinking. Because this tubing has a 2:1 shrink ratio, choose a size where the unshrunk diameter is at least 1.1–1.5× the cable's outer diameter. For example, a 20mm cable bundle would typically work well with the 30mm or 35mm option. When in doubt, size up — you can always apply more heat, but you cannot reverse over-shrinking.

What does 2:1 shrink ratio mean?

A 2:1 ratio means the tubing will shrink to approximately half its original (unshrunk) diameter when heat is applied. For example, the 60mm (≈2.4" unshrunk) option will shrink down to approximately 30mm (≈1.2"). This makes it suitable for a wide range of cable and connector sizes.

What temperature is needed to shrink this tubing?

Standard polyolefin heat shrink tubing generally activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool. Avoid open flames, which can cause uneven shrinking or scorching.

Can this tubing be used outdoors or in wet environments?

Standard polyolefin heat shrink tubing is generally moisture-resistant and suitable for light outdoor use. However, it is not waterproof or adhesive-lined. For fully waterproof applications, we recommend using adhesive-lined (3:1) heat shrink tubing instead. Contact us to confirm suitability for your specific environment.

Is this tubing compatible with automotive wiring?

Yes, polyolefin heat shrink tubing is commonly used in automotive wiring harness repair, connector insulation, and battery terminal protection. The larger diameters (60mm–150mm) are particularly useful for bundling multi-wire harnesses or protecting large-gauge cables.

How much tubing do I need? Can I buy more than 1 meter?

Each unit is sold as 1 meter of tubing. To get more length, simply add multiple units to your cart. For bulk or project quantities, feel free to contact us — we're happy to help you estimate the right amount for your job.

What is the wall thickness after shrinking?

Wall thickness after shrinking varies by diameter. Typically, wall thickness ranges from approximately 0.6mm to 1.5mm depending on the size selected. See variant options or contact us to confirm the exact specification for your chosen diameter.

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

Heat Shrink Tubing 2:1 Ratio Black — 30mm to 150mm Electrical Cable Sleeving

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Description

Heat Shrink Tubing 2:1 Black — Reliable Electrical Insulation for Every Cable Size

✅ Key Features of These Heat Shrink Tubing Sleeves

📐 Technical Specifications — Heat Shrink Tubing 2:1 Black

❓ Frequently Asked Questions

Heat Shrink Tubing 2:1 Ratio Black — 30mm to 150mm Electrical Cable Sleeving

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