PVC Heat Shrink Tubing 2:1 — Reliable Insulation for Large-Diameter Wire & Cable Bundles
When you're dealing with thick cable bundles, large wire splices, or exposed terminals that standard tubing just won't cover, finding the right large-diameter heat shrink can be a real challenge. Whether you're a DIY enthusiast, an auto electrician, or a marine installer, this PVC heat shrink tubing is built for the jobs where size and color-coding both matter.
Each roll is made from flexible PVC material with a 2:1 shrink ratio, meaning the tubing shrinks to approximately half its original flat width when heat is applied. Available in four flat-width sizes — 55mm (≈2.17"), 60mm (≈2.36"), 66mm (≈2.60"), and 70mm (≈2.76") — and in roll lengths from 1 meter (≈3.3 ft) up to 30 meters (≈98.4 ft). Choose from 13 colors including Black, White, Red, Blue, Green, Yellow, Orange, Transparent, and more for easy color-coded identification.
Typical use cases include bundling and insulating large automotive wiring harnesses, protecting cable splices in marine and RV electrical systems, covering exposed bus bars or large connectors in DIY electronics, and organizing multi-cable runs in home workshop or industrial setups.
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Compatibility Note: This tubing is sized by flat (lay-flat) width. After shrinking at 2:1 ratio, the recovered inner diameter will be approximately half the listed flat width. Verify your cable bundle diameter before ordering. Sizes available: 55mm, 60mm, 66mm, 70mm flat width.
✅ Key Features of These PVC Heat Shrink Tubes
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🔥2:1 Shrink Ratio — Shrinks to approximately half its original flat width, conforming snugly around large cable bundles, splices, and connectors for a secure, professional finish.
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📏Four Large Diameter Options — Available in 55mm, 60mm, 66mm, and 70mm flat widths to accommodate a wide range of large-diameter wire bundles and components that standard tubing cannot cover.
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🎨13 Color Choices — Color-code your wiring runs with Black, White, Red, Blue, Green, Yellow, Orange, Transparent, Silver Gray, Purple, Light Green, Light Yellow, and Orange Red options.
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📦Flexible Roll Lengths — Order exactly what you need, from a 1-meter trial length up to a 30-meter bulk roll, reducing waste on small repairs or covering full wiring harness runs.
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⚡Electrical Insulation — PVC construction provides electrical insulation for wire splices, terminals, and cable joints, helping prevent short circuits and protecting against accidental contact.
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✂️Easy to Cut & Apply — Cuts cleanly with scissors or a utility knife; apply heat evenly with a heat gun for consistent shrinkage along the full length of the tubing.
📐 Technical Specifications — PVC Heat Shrink Tubing
| Material |
PVC (Polyvinyl Chloride) |
| Shrink Ratio |
2:1 |
| Available Flat Widths |
55mm (≈2.17"), 60mm (≈2.36"), 66mm (≈2.60"), 70mm (≈2.76") |
| Available Lengths |
1m (≈3.3 ft), 3m (≈9.8 ft), 5m (≈16.4 ft), 10m (≈32.8 ft), 20m (≈65.6 ft), 30m (≈98.4 ft) |
| Available Colors |
Black, White, Yellow, Green, Blue, Red, Transparent, Orange Red, Orange, Light Yellow, Light Green, Silver Gray, Purple |
| Activation Temperature |
Typically 70–120°C (158–248°F); use a heat gun for best results |
| Wall Thickness (before shrink) |
See variant options |
| Voltage Rating |
Contact us to confirm |
| Application |
Wire insulation, cable bundling, splice protection, terminal covering |
| Recommended Tool |
Heat gun (open flame not recommended) |
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Sizing Tip: Flat width is the measurement of the tubing when laid flat. The recovered (post-shrink) inner diameter is typically about half the flat width at 2:1 ratio. If you are unsure which size fits your cable, measure your bundle's outer diameter and select the next size up.
❓ Frequently Asked Questions
How do I choose the right diameter for my application?
Choose a flat width that is larger than your cable or bundle before shrinking. With a 2:1 shrink ratio, the tubing will shrink to approximately half its original flat width. For example, 55mm flat width tubing will recover to roughly 27mm inner diameter. Measure your cable bundle's outer diameter and select the next size up to ensure a snug fit after shrinking.
What temperature is needed to shrink this tubing?
PVC heat shrink tubing generally activates in the range of 70–120°C (158–248°F). A heat gun is typically recommended for even, controlled application. Move the heat gun steadily along the tubing to avoid hot spots. Open flames are generally not recommended, as they can cause uneven shrinking or scorch the material.
Can this tubing be used outdoors or in wet environments?
PVC heat shrink tubing generally provides basic moisture resistance and is suitable for light indoor and sheltered outdoor use. For prolonged outdoor exposure, UV-heavy environments, or submersion, a polyolefin or adhesive-lined heat shrink tubing is typically recommended for better long-term protection. If in doubt, contact us to confirm suitability for your specific environment.
What does the 2:1 shrink ratio mean?
A 2:1 shrink ratio means the tubing will shrink to approximately half its original diameter when heat is applied. For example, a 60mm flat-width tube will recover to roughly 30mm inner diameter, conforming tightly around the cable or component inside. This ratio is standard for general-purpose insulation and bundling applications.
Is this tubing compatible with standard electrical wiring and cable bundles?
Yes. These large-diameter PVC heat shrink tubes are designed for bundling multiple wires, covering cable splices, and insulating large connectors or terminals. They are generally compatible with standard copper and aluminum wiring used in automotive, marine, RV, and DIY electrical projects. For specific voltage or current ratings, contact us to confirm.
How do I select the right length for my project?
Measure the total length of the area you need to cover, then add 10–15% extra to account for trimming or overlap at ends. For large wiring runs or cable management projects, the 10m, 20m, or 30m rolls offer the best value per meter. For smaller repairs, prototyping, or testing fit, the 1m or 3m lengths are typically sufficient.
Can I cut this tubing to custom lengths before shrinking?
Yes. PVC heat shrink tubing can be cut cleanly with standard scissors or a utility knife before applying heat. Cut to your desired length first, slide it over the cable or component, then apply heat evenly for the cleanest, most professional result.
🛒 Select your size, color, and length above, then add to cart — ships from our US warehouse.
