PVC Heat Shrink Tubing — Reliable Large-Diameter Insulation for Cables, Batteries & More
When you're wrapping a large battery pack, bundling thick cable harnesses, or protecting oversized connectors, standard small-bore heat shrink just doesn't cut it. Electricians, EV hobbyists, marine riggers, and DIY builders who work with large-diameter assemblies need tubing that slides on easily, shrinks uniformly, and holds its shape. This PVC heat shrink tubing is designed specifically for those large-format jobs.
Each listing covers a single 1-meter (≈39.4") length of flat-lay PVC heat shrink film tubing. Diameter options range from 120mm (≈4.7") up to 625mm (≈24.6"), with color choices including Black, Blue, Green, Red, White, Yellow, and Transparent. Wall thickness and exact shrink dimensions vary by diameter — see variant options for your specific size. The tubing ships flat and expands to its rated diameter when opened.
Typical use cases include wrapping 18650 and large-format lithium battery packs, insulating bus bars and cable splices, color-coding large conduit runs, and providing protective jacketing for PVC pipe fittings. The wide diameter range makes this PVC heat shrink tubing a go-to solution for large cable insulation wrap and battery pack heat shrink applications.
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Compatibility: Suitable for use over cables, battery cells, bus bars, conduit, and cylindrical assemblies. Verify your assembly's outer diameter against the supplied (pre-shrink) diameter before ordering. Heat gun required — not compatible with open-flame application.
✅ Key Features of These Large Diameter PVC Heat Shrink Tubes
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📏Wide Size Range — Available from 120mm to 625mm supplied diameter, covering large cable insulation wrap, battery pack heat shrink, and oversized connector jacketing in a single product line.
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🎨7 Color Options — Black, Blue, Green, Red, White, Yellow, and Transparent allow color-coded circuit identification and visual organization across complex wiring assemblies.
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🔥Consistent Heat Activation — PVC formulation typically activates between 70°C–120°C (158°F–248°F), allowing controlled shrinkage with a standard heat gun without scorching adjacent components.
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⚡Electrical Insulation — Provides a dielectric barrier suitable for low-voltage cable bundling, battery cell wrapping, and connector insulation in DIY electronics and automotive wiring projects.
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💧Moisture Resistance — The PVC jacket resists incidental moisture, making it appropriate for indoor electrical enclosures, light-duty outdoor cable management, and marine wiring runs above the waterline.
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✂️Easy to Cut and Position — Ships flat for compact storage and easy cutting to custom lengths. The 1m supplied length suits most battery pack heat shrink and large cable splice applications without excess waste.
📐 Technical Specifications — Large Diameter PVC Heat Shrink Tubing
| Material |
PVC (Polyvinyl Chloride) |
| Supplied Length |
1 m (≈39.4") |
| Supplied Diameter Range |
120mm (≈4.7") – 625mm (≈24.6") |
| Shrink Ratio |
Typically 2:1 (shrinks to approx. 50% of supplied diameter) |
| Activation Temperature |
Typically 70°C–120°C (158°F–248°F) |
| Available Colors |
Black, Blue, Green, Red, White, Yellow, Transparent |
| Wall Thickness |
See variant options |
| Voltage Rating |
Contact us to confirm for your specific diameter |
| Application Method |
Heat gun (open flame not recommended) |
| Packaging |
Flat-lay film, 1 piece per order |
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Size Tip: Measure your assembly's outer diameter before ordering. Choose a supplied diameter that is at least 10–20% larger than your assembly to allow the tubing to slide on before shrinking. When in doubt, size up.
❓ Frequently Asked Questions
How do I choose the right diameter for my application?
Measure the outer diameter of the object you need to cover, then select a tubing diameter that is typically 10–20% larger than that measurement. PVC heat shrink generally shrinks to about 50% of its supplied diameter when heated, so a 200mm (≈7.9") tube will shrink down to approximately 100mm (≈3.9"). If you are between sizes, size up to ensure the tubing slides on easily before shrinking.
What shrink ratio does this PVC heat shrink tubing have?
PVC heat shrink tubing of this type generally has a 2:1 shrink ratio, meaning it will shrink to approximately half its original supplied diameter when heat is applied. For example, a 250mm (≈9.8") tube typically shrinks to around 125mm (≈4.9"). Exact shrink performance may vary slightly by diameter — contact us to confirm for your specific size.
What temperature is needed to shrink this tubing?
PVC heat shrink tubing typically activates at temperatures between 70°C–120°C (158°F–248°F). A heat gun is the recommended tool — move it steadily along the tubing to achieve even shrinkage. Avoid open flames, which can cause uneven shrinkage, discoloration, or damage to the material.
Is this tubing suitable for outdoor or wet environments?
PVC heat shrink provides basic moisture resistance and is generally suitable for indoor and light-duty outdoor use. For harsh outdoor environments with prolonged UV exposure or submersion, a polyolefin or adhesive-lined heat shrink tubing is typically recommended instead. For above-waterline marine wiring or sheltered outdoor cable runs, this tubing is in most cases adequate.
Can I use this for battery pack insulation?
Yes — large diameter PVC heat shrink tubing is widely used for wrapping 18650 battery packs, LiFePO4 prismatic cell assemblies, capacitor banks, and other cylindrical or rectangular battery builds. Select a diameter that is slightly larger than your assembled pack's outer circumference before shrinking. The transparent option is popular for builds where cell labels need to remain visible.
Does the color affect the electrical insulation properties?
No. Color is a cosmetic choice and does not affect the electrical insulation or shrink performance of the tubing. All color variants share the same PVC material properties. Color coding is commonly used for phase identification in electrical panels, circuit organization in wiring harnesses, or simply for visual differentiation in multi-cable installations.
What is the voltage rating of this PVC heat shrink tubing?
PVC heat shrink tubing of this type is generally rated for low-voltage applications. Exact voltage ratings vary by wall thickness and diameter. Please contact us to confirm the rating for your specific variant before use in safety-critical electrical applications.
🛒 Select your diameter and color above, then add to cart — ships from our US warehouse.
