2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer
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2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length - HomeDIYer

2:1 Heat Shrink Tubing – Φ20mm to Φ210mm, 11 Colors, 1m Length

HomeDIYer
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By HomeDIYer®

Price:
$4.01 USD
Stock:
In stock (500 units), ready to be shipped

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Description

 

2:1 Heat Shrink Tubing — Reliable Insulation & Cable Protection from Φ20mm to Φ210mm

Whether you're rewiring a trailer harness, tidying up a home theater rack, or protecting exposed solder joints on a marine vessel, loose or uninsulated wires are a safety hazard and an eyesore. Electricians, automotive technicians, hobbyists, and DIYers all face the same challenge: finding heat shrink tubing that fits a wide range of cable diameters without ordering from a dozen different listings.

Each piece of 2:1 heat shrink tubing is sold as a 1-meter (≈39.4") length made from flexible polyolefin material. The expanded (pre-shrink) inner diameter spans Φ20mm (≈0.79") to Φ210mm (≈8.27"), and after applying heat the tubing recovers to approximately half its original diameter — a true 2:1 shrink ratio. Eleven color options — Black, White, Red, Blue, Green, Yellow, Orange, Purple, Grey, Brown, and Clear — make color-coding circuits straightforward.

Typical use cases include bundling and protecting automotive wiring harnesses, insulating electrical connectors and terminal crimps in residential or commercial panel work, and sealing cable entry points on outdoor equipment such as solar installations and garden lighting systems.

🔌 Compatibility: Fits standard copper and aluminum wire, stranded cable bundles, crimp terminals, solder joints, and connector bodies. Verify the expanded inner diameter is larger than your component before ordering.

✅ Key Features of These 2:1 Heat Shrink Tubing Sleeves

  • 📐 Wide Diameter Range — Φ20mm (≈0.79") through Φ210mm (≈8.27") in a single product line, covering everything from thin signal wires to large conduit bundles without switching suppliers.
  • 🔥 True 2:1 Shrink Ratio — Recovers to approximately half its expanded diameter when heated to around 120°C (248°F), creating a firm, conforming sleeve that won't slip or loosen over time.
  • 🎨 11 Color Options — Black, White, Red, Blue, Green, Yellow, Orange, Purple, Grey, Brown, and Clear allow color-coded cable identification in automotive, marine, and electrical panel wiring.
  • ⚡ Polyolefin Insulation Material — Flexible polyolefin construction provides electrical insulation typically rated up to 600V, along with resistance to moisture, mild chemicals, and UV exposure for indoor and outdoor cable sleeve applications.
  • ✂️ Cut-to-Length Convenience — Each piece ships as a 1m (≈39.4") length that cuts cleanly with scissors or a utility knife, so you get exactly the coverage you need with no waste.
  • 🌡️ Heat Gun Compatible — Begins shrinking at approximately 70–90°C (158–194°F); a standard heat gun delivers even, controlled shrinkage across the full diameter range, from small wire insulation wrap to large-bore cable protection sleeves.

📐 Technical Specifications — 2:1 Polyolefin Heat Shrink Tubing

Material Polyolefin
Shrink Ratio 2:1
Expanded Diameter Range Φ20mm (≈0.79") – Φ210mm (≈8.27")
Length per Piece 1m (≈39.4")
Available Colors Black, White, Red, Blue, Green, Yellow, Orange, Purple, Grey, Brown, Clear
Shrink Temperature Typically begins at ~70–90°C (158–194°F); full recovery at ~120°C (248°F)
Voltage Rating Typically up to 600V (low- to medium-voltage applications)
Wall Thickness (pre-shrink) See variant options
Operating Temperature Range Contact us to confirm
Flame Retardancy Contact us to confirm
Applicable Standards Contact us to confirm
⚠️ Wall thickness and exact recovered diameter vary by size. If your application has tight tolerances, contact us before ordering to confirm specifications for your chosen diameter.

❓ Frequently Asked Questions

How do I choose the right diameter for my heat shrink tubing?

Measure the outer diameter of the wire or connector before shrinking. Choose a tubing size whose expanded (pre-shrink) inner diameter is at least 10–20% larger than your component. After heat is applied, the tubing shrinks to approximately half its original diameter (2:1 ratio), so the recovered diameter should be slightly smaller than your component for a snug fit. For example, Φ20mm tubing typically recovers to around Φ10mm (≈0.39").

What does '2:1 shrink ratio' mean?

A 2:1 shrink ratio means the tubing will shrink to approximately half its original expanded diameter when heat is applied. For example, Φ40mm (≈1.57") tubing will generally recover to around Φ20mm (≈0.79"). This ratio is standard for general-purpose polyolefin heat shrink tubing used in wire insulation wrap and cable sleeve applications.

What temperature is needed to shrink this tubing?

Polyolefin heat shrink tubing typically begins to shrink at around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A heat gun is the recommended tool for even, controlled shrinkage. Avoid open flames, which can cause uneven shrinkage or scorching, especially on larger diameters.

Can this heat shrink tubing be used outdoors?

Polyolefin heat shrink tubing generally offers good resistance to UV exposure, moisture, and mild chemicals, making it suitable for many outdoor cable protection applications such as marine wiring, garden lighting, and automotive harnesses. For harsh or submerged environments, adhesive-lined (glue-lined) tubing provides a more waterproof seal — contact us if you need that option.

What is the voltage rating and insulation strength?

Standard polyolefin 2:1 heat shrink tubing is typically rated for up to 600V and provides solid electrical insulation for low- to medium-voltage wiring applications. For high-voltage or industrial-grade requirements, please contact us to confirm specifications before ordering.

Is this tubing compatible with all wire and cable types?

This tubing is compatible with most standard wire gauges, cable bundles, connectors, terminals, and solder joints. It works well over copper, aluminum, and stranded wire. Always verify the expanded inner diameter is larger than your component before ordering to ensure a proper fit.

How do I convert the diameter from mm to inches?

Divide the mm value by 25.4 to get inches. Quick reference:

  • Φ20mm ≈ 0.79"
  • Φ25mm ≈ 0.98"
  • Φ30mm ≈ 1.18"
  • Φ50mm ≈ 1.97"
  • Φ100mm ≈ 3.94"
  • Φ150mm ≈ 5.91"
  • Φ210mm ≈ 8.27"

See the variant selector above for the full size range.

Can I cut the tubing to a shorter length before shrinking?

Yes. Each piece is sold as a 1-meter (≈39.4") length and can be cut to any shorter length with scissors or a utility knife before or after shrinking. Cut ends are clean and do not fray, making it easy to customize coverage for short connector insulation wrap or longer cable sleeve runs.

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

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