Large Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & Lengths
Large Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & Lengths
Large Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & Lengths
Large Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & Lengths
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Large Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & LengthsLarge Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & LengthsLarge Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & LengthsLarge Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & Lengths

Large Diameter Heat Shrink Tubing 2:1 — φ70mm to φ210mm, Multiple Colors & Lengths

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By HomeDIYer®

Price:
$9.90 USD
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In stock (500 units), ready to be shipped

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Description

Large Diameter Heat Shrink Tubing 2:1 — Reliable Protection for Big Cables, Pipes & Bundles

When standard small-bore heat shrink just won't fit, electricians, automotive technicians, marine riggers, and industrial DIYers reach for large diameter heat shrink tubing. Whether you're insulating thick cable looms, protecting hydraulic hose ends, bundling conduit runs, or finishing off a custom fabrication project, finding tubing that actually fits — and shrinks evenly — is the real challenge. This large diameter heat shrink tubing 2:1 is designed specifically for those oversized applications where off-the-shelf options fall short.

Each piece is made from flexible polyolefin material and is available in diameters from φ70mm (≈2.76") up to φ210mm (≈8.27"), with a 2:1 shrink ratio that recovers the tubing to approximately half its supplied diameter. Lengths are available in 1M (≈39.4"), 2M (≈78.7"), and 3M (≈118.1") cuts. Colors include black, white, red, green, yellow, blue, and transparent — making it easy to color-code or match your project's requirements.

Typical use cases include large cable bundle insulation and strain relief in industrial control panels, protective sleeving for marine wiring harnesses and battery cable terminations, pipe and hose end protection in automotive and HVAC applications, and cosmetic finishing on custom fabrication and DIY electrical projects where a clean, professional look matters.

ℹ️ Compatibility Note: This tubing fits over round or irregular cross-sections with a pre-shrink outer diameter smaller than the selected tube size. Verify your object's outer diameter before ordering. For fully waterproof sealing, an adhesive-lined variant is recommended — contact us to confirm.

✅ Key Features of These Large Diameter Heat Shrink Tubes

  • 📐Wide Size Range — Available from φ70mm (≈2.76") to φ210mm (≈8.27"), covering large cable bundles, thick hoses, and oversized connectors that standard heat shrink tubing cannot accommodate.
  • 🔥2:1 Shrink Ratio — Recovers to approximately half the supplied diameter when heated, providing a firm, conforming grip around the covered object for secure insulation and strain relief.
  • 🎨7 Color Options — Black, white, red, green, yellow, blue, and transparent allow color-coding of circuits, phase identification in electrical panels, and aesthetic matching on custom builds.
  • ✂️Cut-to-Length Flexibility — Supplied in 1M, 2M, and 3M lengths that can be trimmed to any shorter dimension with scissors or a utility knife, reducing waste on varied job sizes.
  • 🛡️Polyolefin Construction — Offers general resistance to moisture, mild chemicals, and abrasion, making it suitable for indoor wiring, automotive engine bays, and semi-exposed outdoor installations.
  • ⚡Electrical Insulation — Functions as a dielectric sleeve for wire insulation and connector protection in low-to-medium voltage applications, helping prevent accidental contact and short circuits in bundled cable runs.

📐 Technical Specifications — Large Diameter Heat Shrink Tubing

Product Type Heat Shrink Tubing
Shrink Ratio 2:1
Available Diameters (Supplied) φ70mm (≈2.76"), φ80mm (≈3.15"), φ90mm (≈3.54"), φ100mm (≈3.94"), φ120mm (≈4.72"), φ150mm (≈5.91"), φ180mm (≈7.09"), φ210mm (≈8.27")
Recovered Diameter (Approx.) Typically ~50% of supplied diameter (e.g., φ100mm recovers to ~50mm / ≈1.97")
Available Lengths 1M (≈39.4"), 2M (≈78.7"), 3M (≈118.1")
Available Colors Black, White, Red, Green, Yellow, Blue, Transparent
Material Polyolefin
Shrink Temperature Typically 120°C (248°F) full recovery; begins shrinking at ~70–90°C
Wall Thickness (Pre-Shrink) See variant options
Voltage Rating Contact us to confirm
Waterproofing Standard (non-adhesive lined); contact us for adhesive-lined options
Country of Origin See product listing
⚠️ Sizing Tip: Always measure your object's outer diameter before selecting a size. The supplied (pre-shrink) diameter must be larger than your object for installation, and the recovered diameter must be smaller for a secure fit. When in doubt, size up — you can always apply more heat, but you cannot un-shrink tubing.

❓ Frequently Asked Questions

How do I choose the right diameter for my application?

Measure the outer diameter of the object you need to cover before shrinking. The tubing's recovered (post-shrink) inner diameter should be smaller than that measurement. With a 2:1 shrink ratio, a φ70mm tube will recover to approximately 35mm (≈1.38"). As a general rule, select a size where the supplied diameter is at least 20–30% larger than your object for easy installation, and the recovered diameter is snug enough to grip firmly.

What does 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 example, a φ100mm (≈3.94") tube will typically recover to around 50mm (≈1.97"). This ratio is generally suitable for covering cables, pipes, and connectors where a moderate reduction is needed.

What temperature is needed to shrink this tubing?

Most polyolefin-based heat shrink tubing in this size range 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 recommended for even, controlled shrinking. Avoid open flames, which can cause uneven shrinkage or scorching on larger diameter tubes.

Can this tubing be used outdoors or in wet environments?

Standard polyolefin heat shrink tubing generally offers good resistance to moisture, UV exposure, and mild chemicals, making it suitable for many outdoor and semi-exposed applications. However, for fully waterproof sealing, an adhesive-lined (dual-wall) variant is typically recommended. If your project requires full waterproofing, please contact us to confirm the right product.

Is this tubing electrically insulating?

Yes, polyolefin heat shrink tubing is generally an electrical insulator and is commonly used for wire insulation, cable bundling, and connector protection in electrical and automotive applications. Specific dielectric strength values vary by wall thickness and material grade — contact us if you need confirmed electrical ratings for your project.

What colors are available and does color affect performance?

This tubing is available in black, white, red, green, yellow, blue, and transparent. Color is primarily for identification, organization, or aesthetic purposes and does not typically affect the mechanical or electrical performance of the tubing. Transparent tubing allows you to see the underlying component after shrinking, which is useful for inspection or labeling purposes.

Can I cut the tubing to a custom length?

Yes. The tubing is sold in 1M (≈39.4"), 2M (≈78.7"), and 3M (≈118.1") lengths and can be cut to any shorter length with scissors or a utility knife before or after shrinking. Cut ends cleanly for the neatest finish. If you need lengths longer than 3M, multiple pieces can be overlapped slightly for continuous coverage.

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

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