28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation
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28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation

28mm Heat Shrink Tubing 2:1 Ratio – φ28mm Wire Sleeve for Cable Insulation

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Beschreibung

28mm Heat Shrink Tubing — Reliable Insulation for Large-Diameter Cables & Wire Bundles

When you're dealing with exposed wire splices, frayed cable ends, or bundled wiring harnesses that standard electrical tape just can't handle cleanly, you need a solution that holds up. DIYers, auto enthusiasts, marine riggers, and electricians working with larger cable runs all face the same challenge: finding heat shrink tubing in the right diameter that actually stays put, seals properly, and looks professional when the job is done.

This 28mm heat shrink tubing features a 2:1 shrink ratio, meaning the φ28mm (≈1.10") inner diameter shrinks down to approximately φ14mm (≈0.55") when heat is applied. Each listing covers a single continuous length — available in 1 Metre (≈3.3 ft), 2 Metre (≈6.6 ft), 5 Metre (≈16.4 ft), and 10 Metre (≈32.8 ft) — so you can buy exactly what your project requires. Made from polyolefin, the tubing is flexible, flame-retardant, and resistant to moisture and common chemicals. Choose from seven colors: Black, White, Red, Green, Yellow, Blue, and Transparent.

Typical applications include automotive wiring harness protection, marine cable management, electrical panel wire bundling, and DIY home workshop cable organization. The color-coded options make it easy to implement color-coded wire identification systems for faster troubleshooting on complex electrical builds.

ℹ️ Compatibility Note: This listing covers φ28mm inner diameter tubing only. Verify your cable bundle or connector diameter is ≤28mm before ordering. For smaller wire gauges, see our other heat shrink tubing sizes.

✅ Key Features of These 28mm Heat Shrink Tubes

  • 🔥2:1 Shrink Ratio — Shrinks from φ28mm down to approximately φ14mm for a firm, conforming fit over cable ends, connectors, and wire bundles without gaps or loose sections.
  • 🎨7 Color Options — Available in Black, White, Red, Green, Yellow, Blue, and Transparent to support color-coded wire identification systems in automotive, marine, and panel wiring projects.
  • 📏4 Length Options — Choose 1m, 2m, 5m, or 10m to match your project scale, from a single repair splice to a full wiring harness installation.
  • 🛡️Polyolefin Construction — Flame-retardant polyolefin material provides electrical insulation, moisture resistance, and protection against abrasion for heat shrink tubing used in automotive and outdoor wiring.
  • 🌡️Wide Temperature Tolerance — Rated for continuous use from -55°C to +125°C (-67°F to +257°F), making it suitable for engine bay wiring, outdoor installations, and industrial cable management.
  • ✂️Easy to Cut & Apply — Cuts cleanly with standard scissors or a utility knife; shrinks evenly with a heat gun in seconds, leaving a neat, professional finish on wire sleeve repairs and cable insulation jobs.

📐 Technical Specifications — 28mm Heat Shrink Tubing

Inner Diameter (Before Shrink) φ28mm (≈1.10")
Inner Diameter (After Shrink) ≈φ14mm (≈0.55") — typically
Shrink Ratio 2:1
Material Polyolefin
Flame Rating Flame-retardant (typically UL 224 compliant — confirm with us)
Operating Temperature -55°C to +125°C (-67°F to +257°F) — typically
Shrink Temperature 90°C–120°C (194°F–248°F) — typically
Available Colors Black, White, Red, Green, Yellow, Blue, Transparent
Available Lengths 1m (≈3.3 ft), 2m (≈6.6 ft), 5m (≈16.4 ft), 10m (≈32.8 ft)
Wall Thickness (Before Shrink) See variant options
Voltage Rating Contact us to confirm
Application Tool Heat gun recommended
⚠️ Heads up: Wall thickness and exact voltage rating vary by production batch. If your application has strict electrical specifications, please contact us before ordering to confirm current specs.

❓ Frequently Asked Questions

How do I choose the right length of heat shrink tubing?

Measure the total length of the wire or cable section you need to cover, then add at least 10–15% extra to account for shrinkage along the length axis. For most DIY and automotive jobs, 1m or 2m lengths are sufficient; for larger wiring harness projects, the 5m or 10m rolls offer better value per foot.

What does 2:1 shrink ratio mean?

A 2:1 shrink ratio means the tubing will shrink to approximately half its original inner diameter when heat is applied. This φ28mm tubing will typically shrink down to around φ14mm (≈0.55"), creating a snug, secure fit over the covered component.

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

Yes. Polyolefin heat shrink tubing is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for outdoor wiring, engine bay repairs, and marine cable management. For prolonged submersion or harsh chemical environments, an adhesive-lined variant is generally recommended.

What is the operating temperature range?

This tubing is typically rated for continuous operation from -55°C to +125°C (-67°F to +257°F). Shrinking is generally achieved at temperatures between 90°C and 120°C (194°F–248°F) using a heat gun or similar tool. Avoid open flame where possible for even results.

Is this tubing compatible with standard wire gauges and connectors?

The φ28mm inner diameter (before shrinking) is designed to fit over larger cable bundles, conduit ends, and connectors up to approximately 28mm in diameter. After shrinking, it conforms tightly to the underlying surface. For smaller wire gauges, we recommend checking our other diameter options.

Do the different colors have any functional difference?

No — all color variants share the same material, shrink ratio, and performance characteristics. Color coding is commonly used in electrical work to identify circuits, polarity, or wire groups at a glance, which can simplify troubleshooting and maintenance on complex wiring harness builds.

What tool do I need to shrink this tubing?

A heat gun is the recommended tool for even, controlled shrinking. In a pinch, a lighter can work for small sections, but a heat gun provides more consistent results and reduces the risk of scorching the tubing or underlying wire insulation. Most standard heat guns set to medium heat work well.

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

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