Large Diameter PVC Heat Shrink Tubing — Clean, Durable Battery Pack Insulation
If you've ever finished building a battery pack only to have it look like a tangle of exposed cells and bare connections, you know how frustrating it is to find a sleeve that actually fits. Most standard heat shrink tubing tops out at small diameters — leaving DIY builders, EV hobbyists, and repair technicians searching for a large-diameter solution that slides over multi-cell packs without a fight.
This PVC heat shrink tubing is available in flat widths from 110mm to 150mm (recovered inner diameters Φ70mm–Φ95mm), sold in cut lengths of 1M (≈3.3 ft), 3M (≈9.8 ft), 5M (≈16.4 ft), and 10M (≈32.8 ft). Each piece is a single continuous tube — no seams, no joints. Colors include Red, Black, Blue, Green, White, Fruit Green, and Clear ("Clean"), making it easy to color-code battery packs or match your build's aesthetic.
Typical use cases include wrapping 18650 and 21700 lithium-ion battery packs for e-bikes and power tools, sleeving large cable bundles for automotive and marine wiring harnesses, and protecting DIY spot-welded battery assemblies with a finished, professional-looking insulation layer.
🔋 Compatibility Note: Flat width = half the expanded circumference. Match the flat width to your pack's outer circumference ÷ 2. Recovered Φ diameter is shown in each variant name (e.g., 110mm flat → Φ70mm recovered). When in doubt, size up.
✅ Key Features of These Large Diameter PVC Heat Shrink Tubes
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📐Wide Size Range — Flat widths from 110mm (Φ70mm) to 150mm (Φ95mm) cover most multi-cell 18650 and 21700 battery pack configurations without requiring custom tooling.
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🎨7 Color Options — Red, Black, Blue, Green, White, Fruit Green, and Clear let you color-code battery packs by voltage, capacity, or chemistry for faster identification during maintenance.
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✂️Flexible Cut Lengths — Available in 1M, 3M, 5M, and 10M rolls so you can buy exactly what your project needs — whether it's a single prototype pack or a batch production run.
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⚡Electrical Insulation — PVC material provides dielectric insulation suitable for low-voltage battery pack wrapping and cable bundling, helping prevent accidental shorts on exposed cell contacts.
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🔥Low Activation Temperature — Shrinks reliably with a standard heat gun at low-to-medium settings (typically 70–90°C / 160–195°F), making it accessible for bench-top DIY work without industrial equipment.
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🧹Clean Finished Appearance — Once shrunk, the tubing conforms tightly to the pack surface, eliminating loose wrapping and giving battery assemblies a neat, finished look suitable for resale or gifting.
📐 Technical Specifications — Large Diameter PVC Heat Shrink Tubing
| Material |
PVC (Polyvinyl Chloride) |
| Flat Width Options |
110mm, 115mm, 120mm, 123mm, 125mm, 130mm, 135mm, 140mm, 145mm, 150mm |
| Recovered Inner Diameter (Φ) |
Φ70mm – Φ95mm (see variant name for each size) |
| Shrink Ratio |
Typically 2:1 |
| Activation Temperature |
Typically 70–90°C (160–195°F) |
| Available Lengths |
1M (≈3.3 ft), 3M (≈9.8 ft), 5M (≈16.4 ft), 10M (≈32.8 ft) |
| Colors |
Red, Black, Blue, Green, White, Fruit Green, Clear ("Clean") |
| Voltage Rating |
See variant options — contact us to confirm for high-voltage use |
| Wall Thickness (recovered) |
Contact us to confirm |
| Recommended Application Tool |
Heat gun (low–medium setting); avoid open flame |
| Typical Use |
Battery pack insulation, cable bundling, DIY electronics repair |
⚠️ Sizing Tip: If you are unsure which flat width fits your battery pack, measure the pack's outer circumference with a flexible tape, divide by 2, and choose the next size up. For example, a pack with a 220mm circumference needs at least 110mm flat width.
❓ Frequently Asked Questions
How do I choose the right flat width for my battery pack?
Measure the circumference of your battery pack or cable bundle, then divide by 2 to get the required flat width. For example, a 18650 cell pack that is roughly 140mm around needs a flat width of about 70mm — so the 110mm (Φ70mm) option would typically be the right fit. When in doubt, size up slightly so the tubing slides on easily before shrinking.
What shrink ratio does this PVC tubing have?
PVC heat shrink tubing generally has a 2:1 shrink ratio, meaning it shrinks to approximately half its expanded diameter when heat is applied. The recovered (shrunk) inner diameter is shown as the Φ value in the variant name — for example, 110mm flat width recovers to approximately Φ70mm.
What temperature is needed to shrink this tubing?
PVC heat shrink tubing typically activates at around 70–90°C (160–195°F). A heat gun set to low or medium is recommended. Avoid open flames, as they can scorch or melt the material unevenly.
Can I use this tubing outdoors or in wet environments?
PVC heat shrink tubing provides basic moisture resistance and is suitable for indoor and light outdoor use. For prolonged outdoor exposure or submersion, a dual-wall adhesive-lined heat shrink tubing is generally a better choice, as it provides a waterproof seal.
Is this tubing compatible with lithium-ion battery packs?
Yes. Large-diameter PVC heat shrink tubing is widely used for wrapping 18650, 21700, and custom lithium-ion battery packs. It provides electrical insulation and a clean finished appearance. Confirm the flat width matches your pack's circumference before ordering.
How do I cut the tubing to the length I need?
Use sharp scissors or a utility knife to cut PVC heat shrink tubing to your desired length before applying heat. Cut on a flat surface for a clean, straight edge. The tubing is sold in 1M, 3M, 5M, and 10M lengths so you can choose the quantity that best fits your project.
What is the voltage rating of this PVC heat shrink tubing?
PVC heat shrink tubing in this size range is generally rated for low-voltage applications, typically up to 600V. For high-voltage or industrial applications, please contact us to confirm suitability before ordering.
🛒 Select your size, color, and length above, then add to cart — ships from our US warehouse.
