30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve
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30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve

30mm Heat Shrink Tubing 2:1 Ratio – Electrical Cable Insulation Sleeve

HomeDIYer
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By HomeDIYer®

Price:
$3.52 USD
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In stock (500 units), ready to be shipped

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Description

30mm Heat Shrink Tubing 2:1 — Reliable Electrical Cable Insulation for DIYers and Pros

Whether you're splicing wires under the hood, tidying up a home electrical panel, or protecting cable ends on a marine build, finding heat shrink tubing that actually fits large connectors and bundles without splitting or sliding off is a real frustration. This 30mm heat shrink tubing 2:1 is designed for exactly those situations — giving electricians, automotive enthusiasts, and hands-on DIYers a clean, secure insulation solution for larger-diameter cables and connectors.

Each order includes a continuous length of polyolefin heat shrink tubing with a pre-shrink inner diameter of 30mm (≈1-3/16") that shrinks down to approximately 15mm (≈19/32") at a 2:1 ratio. Available in lengths from 1 Meter (≈3.3 ft) up to 15 Meters (≈49.2 ft), and in seven colors — Black, White, Red, Green, Yellow, Blue, and Transparent — so you can color-code wiring runs or match your project's aesthetic. The tubing can be cut to any length with standard scissors or a utility knife.

Typical use cases include automotive wiring harness protection, marine cable bundling and moisture resistance, electrical splice insulation in residential and commercial panels, and strain relief on power tool cords. The transparent variant is especially useful when you need to inspect the connection underneath without removing the sleeve — a common need in control panel wiring and prototype electronics.

ℹ️ Compatibility Note: 30mm is the expanded inner diameter. After shrinking, the tubing typically reaches approximately 15mm (≈19/32"). Always measure your cable bundle or connector at its widest point before selecting a size. If your cable diameter is close to 15mm, consider sizing up.

✅ Key Features of These 30mm Heat Shrink Tubes

  • 🔥2:1 Shrink Ratio — Shrinks from 30mm expanded to approximately 15mm recovered, providing a snug, uniform fit around large cable bundles and connectors without gaps or loose ends.
  • 🎨7-Color Selection — Available in Black, White, Red, Green, Yellow, Blue, and Transparent, making color-coded wiring identification straightforward in automotive, marine, and panel wiring applications.
  • 📏Flexible Length Options — Choose from 1m (≈3.3 ft) up to 15m (≈49.2 ft) to match your project scale, whether it's a single splice repair or a full wiring harness run.
  • ⚡Electrical Insulation — Polyolefin construction provides solid dielectric insulation, generally rated up to 600V, suitable for standard residential, automotive, and low-voltage electrical cable sleeving tasks.
  • 💧Moisture-Resistant Shrink — Once fully shrunk, the tubing forms a close-fitting sleeve that resists moisture ingress, making it a practical choice for outdoor cable protection and damp-environment wiring.
  • ✂️Easy to Cut and Apply — Cuts cleanly with scissors or a utility knife; shrinks evenly with a standard heat gun, making installation straightforward for heatshrink tubing insulation on connectors, splices, and cable ends.

📐 Technical Specifications — 30mm Heat Shrink Tubing

Material Polyolefin
Shrink Ratio 2:1
Expanded Inner Diameter 30mm (≈1-3/16")
Recovered Inner Diameter Approximately 15mm (≈19/32")
Available Lengths 1m (≈3.3 ft), 3m (≈9.8 ft), 5m (≈16.4 ft), 8m (≈26.2 ft), 10m (≈32.8 ft), 15m (≈49.2 ft)
Available Colors Black, White, Red, Green, Yellow, Blue, Transparent
Shrink Temperature Typically 70–120°C (158–248°F)
Voltage Rating Typically up to 600V — contact us to confirm for your application
Wall Thickness (recovered) See variant options
Operating Temperature Range Generally -55°C to +125°C (-67°F to +257°F) — contact us to confirm
Application Method Heat gun recommended; open flame with caution
Cutting Standard scissors or utility knife
⚠️ Spec Note: Recovered wall thickness and exact operating temperature range vary by production batch. If your application has strict tolerances, please contact us before ordering to confirm current specifications.

❓ Frequently Asked Questions

What does 30mm refer to — the diameter before or after shrinking?

30mm is the expanded (pre-shrink) inner diameter. After applying heat, the tubing shrinks to approximately 15mm (≈19/32") at a 2:1 ratio. Always measure your cable or connector at its widest point and choose a tube diameter that is slightly larger than that measurement for a clean, secure fit.

How do I choose the right length for my project?

Measure the total run of cable or splice you need to cover, then add at least 10–15% extra for overlap and trimming. For single wire repairs, 1m (≈3.3 ft) is typically sufficient. For wiring harnesses or longer automotive runs, 5m (≈16.4 ft) or longer is generally recommended. Buying a longer roll gives you flexibility to cut to exact lengths as needed.

What shrink temperature is required, and can I use a lighter instead of a heat gun?

This tubing typically activates at around 70–90°C (158–194°F) and reaches full shrink at approximately 120°C (248°F). A heat gun is the recommended tool for even, controlled shrinkage. An open flame (lighter or torch) can be used carefully but may cause uneven shrinkage, scorching, or discoloration — especially on the Transparent variant.

Can this heat shrink tubing be used outdoors or in wet environments?

Standard polyolefin heat shrink tubing generally provides moisture resistance once fully shrunk, making it suitable for many outdoor and damp-environment applications such as marine cable bundling and exterior junction protection. However, it is not fully waterproof by default. For applications requiring a watertight seal, adhesive-lined (glue-lined) heat shrink tubing is the more appropriate choice.

What is the voltage rating of this tubing?

Polyolefin 2:1 heat shrink tubing in this size range is generally rated for up to 600V, which covers most residential, automotive, and low-voltage electrical cable sleeving applications. For high-voltage or industrial environments, please contact us to confirm the specific rating before ordering.

Is this tubing compatible with standard wire gauges and connectors?

Yes. At 30mm expanded diameter, this tubing is well-suited for covering large connectors, multi-wire bundles, conduit ends, and cable joints. It is compatible with most standard automotive, marine, and electrical connector sizes in that diameter range. If you're unsure whether your connector will fit, measure its outer diameter and compare it to the 30mm expanded / 15mm recovered dimensions.

Do the colors affect performance, or are they purely for identification?

The colors are primarily for identification and organization — for example, using Red for positive leads and Black for ground in automotive wiring, or color-coding circuits in a control panel. All color variants share the same electrical insulation and thermal performance characteristics. The Transparent variant is particularly useful when you need to visually inspect the connection without removing the sleeve.

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

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