PVC Heat Shrink Tubing for Large-Diameter Cable Insulation — Reliable Protection for Every Run
Whether you're wrapping a thick wire bundle in your workshop, protecting exposed conduit on a marine vessel, or finishing a professional electrical installation, finding heat shrink tubing that actually fits large cables is a constant challenge. Standard tubing maxes out too small, leaving your cables exposed and your project unfinished. This PVC heat shrink tubing is purpose-built for large-diameter applications, giving electricians, DIYers, and industrial technicians a dependable solution that slides on easily and shrinks down tight.
Each roll is made from flexible PVC material and is available in flat widths ranging from 103mm (≈4.1") to 500mm (≈19.7"), with recovered diameters (Φ) from 65mm (≈2.6") up to 318mm (≈12.5"). Lengths are available in 1M (≈3.3 ft), 2M, 3M, 4M, 5M, and 10M options. Choose from Blue or Transparent to suit your color-coding or visibility needs. The tubing ships as a flat roll and expands to slip over your cable before shrinking down with applied heat.
This large-diameter heat shrink sleeving is ideal for bundling and insulating multi-conductor cable assemblies, protecting pipe joints and conduit ends from moisture and abrasion, and finishing wire harnesses in automotive, marine, and industrial wiring projects. The transparent variant is especially useful for cable labeling applications where you need to keep identification markings visible after installation.
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Compatibility: Designed for large-diameter cables, pipe joints, wire bundles, and conduit ends. Match the recovered diameter (Φ) listed for each size to your cable's outer diameter. Available in flat widths 103mm–500mm with Blue or Transparent finish.
✅ Key Features of These PVC Heat Shrink Tubing Sleeves
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📏Wide Size Range — Flat widths from 103mm (≈4.1") to 500mm (≈19.7") cover everything from medium cable bundles to large industrial conduit, making it one of the most versatile large-diameter heat shrink options available.
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🔵Two Color Options — Available in Blue for clean color-coded cable runs and Transparent for applications where labels or cable markings need to remain visible after shrinking.
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🔥Low Activation Temperature — Shrinks reliably at temperatures typically between 70°C–90°C (158°F–194°F), compatible with standard heat guns for fast, even application without scorching.
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🛡️Electrical Insulation & Moisture Resistance — PVC construction provides solid dielectric insulation for low-voltage wiring and shields cable surfaces from dust, light moisture, and mechanical abrasion.
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✂️Cut-to-Length Flexibility — Available in rolls from 1M to 10M; cut to any custom length with scissors or a utility knife before applying heat, minimizing waste on your cable insulation sleeving projects.
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🏭Flat-Roll Storage Design — Ships and stores as a flat roll for compact packaging, then opens into a tube shape when slid over the cable — no splitting or pre-cutting required for installation.
📐 Technical Specifications — PVC Heat Shrink Tubing
| Material |
PVC (Polyvinyl Chloride) |
| Color Options |
Blue / Transparent |
| Flat Width Range |
103mm (≈4.1") – 500mm (≈19.7") |
| Recovered Diameter (Φ) Range |
65mm (≈2.6") – 318mm (≈12.5") |
| Available Lengths |
1M, 2M, 3M, 4M, 5M, 10M |
| Shrink Ratio |
Typically 2:1 |
| Activation Temperature |
Typically 70°C – 90°C (158°F – 194°F) |
| Voltage Rating |
Generally up to 600V AC (low-voltage applications) |
| Wall Thickness (after shrink) |
See variant options |
| Application Method |
Heat gun (recommended); avoid open flame |
| Suitable For |
Wire bundles, cable joints, pipe ends, conduit insulation |
| Storage Form |
Flat roll |
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Size Selection Tip: Measure your cable or pipe's outer diameter, then select the variant whose recovered diameter (Φ) is closest to — but slightly larger than — your measurement. If you're unsure, contact us to confirm before ordering.
❓ Frequently Asked Questions
How do I choose the right flat width for my cable or pipe?
Measure the circumference of your cable or pipe, then divide by 2 to get the required flat width. For example, a pipe with a 200mm circumference needs a flat width of approximately 100mm. As a general rule, choose a flat width that is 5–10% larger than half the circumference to allow easy sliding and a snug fit after shrinking. All sizes listed show both flat width and recovered diameter (Φ) to help you match the right fit.
What is the shrink ratio of this PVC heat shrink tubing?
PVC heat shrink tubing typically has a 2:1 shrink ratio, meaning it shrinks to approximately half its expanded diameter when heat is applied. The recovered diameter (Φ) listed for each size reflects the approximate final diameter after shrinking. For example, the 103mm flat width variant has a recovered diameter of approximately Φ65mm (≈2.6").
What temperature is needed to shrink this tubing?
PVC heat shrink tubing generally activates at temperatures between 70°C and 90°C (158°F–194°F). A heat gun set to low or medium is recommended for even, controlled shrinkage. Avoid open flames, as uneven heat can cause scorching or uneven shrinkage, particularly on larger diameters.
Can this tubing be used outdoors or in wet environments?
PVC heat shrink tubing provides good moisture resistance and is generally suitable for indoor and light outdoor use — such as protecting cable ends in garages, workshops, or covered outdoor installations. For prolonged direct outdoor exposure, UV environments, or submersion, please contact us to confirm suitability for your specific application.
What voltage rating does this insulation sleeving support?
This PVC heat shrink tubing is typically rated for low-voltage applications, generally up to 600V AC. It is well-suited for residential and light commercial electrical work, automotive wiring, and marine cable protection. For high-voltage or industrial-grade applications, contact us to confirm suitability before ordering.
Is this tubing compatible with standard wire and cable sizes?
Yes. This tubing is specifically designed for large-diameter cables, pipes, and bundles. The flat width range of 103mm to 500mm covers a wide variety of applications — from medium wire harnesses to large industrial conduits. Match the recovered diameter (Φ) listed for each variant to your cable's outer diameter for the best fit. If your cable diameter falls between two sizes, choose the next size up.
What is the difference between the Blue and Transparent options?
Both colors offer the same insulation and shrink performance. The Transparent option allows you to see labels, markings, or the cable surface underneath after shrinking — useful for identification and inspection purposes. The Blue option provides a clean, finished look and is commonly used for color-coding cable runs in electrical panels and wire management systems.
Can I cut this tubing to a custom length?
Yes. The tubing can be cut to any length using standard scissors or a utility knife before applying heat. We offer lengths from 1M (≈3.3 ft) to 10M (≈32.8 ft) so you can order the quantity that best suits your project without excess waste. For large projects, the 5M or 10M rolls offer the best value per meter.
🛒 Select your size, color, and length above, then add to cart — ships from our US warehouse.
