PVC Heat Shrink Tubing — Large-Diameter Insulation for RC Battery Packs & Wire Bundles
Rebuilding an RC battery pack or tidying up a wiring harness shouldn't mean hunting down the right sleeve size. Whether you're a hobbyist rewrapping a LiPo pack, an electrician bundling cables, or a maker insulating a DIY power bank, finding large-diameter heat shrink tubing in the right color and size is often harder than the job itself.
This PVC heat shrink tubing is sold in 1-meter (≈39.4") lengths and is available in diameters from 40mm (≈1.57") up to 103mm (≈4.06"), covering a wide range of battery pack and cable bundle sizes. The flat-lay width listed corresponds to the tubing's open circumference before shrinking; once heated, it conforms snugly around your bundle at approximately a 2:1 shrink ratio. Eight color options — black, white, yellow, green, blue, red, transparent, and purple — make color-coding and identification straightforward.
Typical applications include wrapping RC LiPo and NiMH battery packs for protection and a clean finish, sleeving wire harnesses and cable bundles in automotive or marine builds, and insulating DIY power tool battery rebuilds where a neat, abrasion-resistant outer layer is needed.
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Compatibility Note: Diameter listed is the flat-lay (folded) width. Select a size approximately 20–30% larger than your bundle's outer diameter for easy insertion before shrinking. Fits LiPo, NiMH, Li-ion, and cylindrical cell battery packs, as well as general wire and cable bundles.
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Sizing Tip: If you are unsure which diameter fits your application, measure your bundle's outer diameter and contact us to confirm before ordering. Specific shrink ratios and wall thickness may vary slightly by diameter — see variant options for details.
✅ Key Features of These PVC Heat Shrink Tubes
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📏Wide Diameter Range — Available from 40mm (≈1.57") to 103mm (≈4.06") flat-lay width, covering most RC battery pack sizes and large cable bundle insulation needs in a single product line.
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🎨8 Color Options — Choose from black, white, yellow, green, blue, red, transparent, or purple to color-code battery packs by cell count, voltage, or application — no more mix-ups in your parts bin.
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🔥Consistent Heat Activation — PVC material shrinks reliably at low to medium heat gun temperatures (typically 70–90°C / 158–194°F), giving you control over the shrink process without scorching.
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⚡Electrical Insulation — Provides a protective insulating sleeve that reduces short-circuit risk from exposed battery contacts and wire connections in RC vehicles, power tools, and DIY electronics.
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✂️Cut-to-Length Flexibility — Each 1M (≈39.4") length can be cut to any shorter size before application, reducing waste and letting you get multiple wraps from a single piece.
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🛡️Abrasion-Resistant Outer Layer — Once shrunk, the PVC sleeve adds a layer of protection against minor abrasion, vibration wear, and surface contact — useful for battery packs mounted in RC chassis or tool housings.
📐 Technical Specifications — PVC Heat Shrink Tubing
| Material |
PVC (Polyvinyl Chloride) |
| Diameter Range (Flat-Lay) |
40mm (≈1.57") — 103mm (≈4.06") |
| Available Diameters |
40, 43, 45, 50, 55, 60, 66, 70, 75, 78, 80, 83, 85, 90, 91, 95, 103mm |
| Length per Piece |
1M (≈39.4") |
| Shrink Ratio |
Typically 2:1 |
| Activation Temperature |
Typically 70–90°C (158–194°F) |
| Colors Available |
Black, White, Yellow, Green, Blue, Red, Transparent, Purple |
| Wall Thickness (after shrink) |
See variant options |
| Typical Applications |
RC battery pack wrapping, wire bundle insulation, cable sleeving, DIY battery rebuilds |
| Flame Resistance |
Contact us to confirm |
| Operating Temperature Range |
Contact us to confirm |
❓ Frequently Asked Questions
How do I choose the right diameter for my battery pack or wire bundle?
Measure the outer diameter of your battery pack or wire bundle before shrinking. The diameter listed (e.g., 40mm) is the flat-lay width — the folded measurement of the tubing when flattened. When opened into a tube, the inner circumference is approximately twice the flat-lay width. As a general rule, choose a size about 20–30% larger than your bundle's outer diameter to allow easy insertion. For example, a 40mm flat-lay tube typically fits bundles up to approximately 25mm in diameter before shrinking.
What is the shrink ratio, and how much will the tubing shrink?
PVC heat shrink tubing typically has a shrink ratio of approximately 2:1, meaning it shrinks to roughly half its original diameter when heat is applied. This is generally sufficient for securing RC battery packs, wire harnesses, and cable bundles. Lengthwise shrinkage is minimal — typically less than 5% — so a 1M piece will remain close to 1M after shrinking.
Can this tubing be used outdoors or in wet environments?
PVC heat shrink tubing provides a degree of moisture resistance and is suitable for general indoor and light outdoor use. It is not rated as fully waterproof or submersible. For harsh outdoor, marine, or high-humidity environments, a dual-wall adhesive-lined heat shrink tubing is generally recommended for a sealed, waterproof finish.
Is this compatible with LiPo, NiMH, and Li-ion RC battery packs?
Yes. This large-diameter PVC heat shrink tubing is commonly used to wrap and insulate LiPo, NiMH, and Li-ion RC battery packs. It provides a clean, protective outer sleeve that holds cells together and protects against minor abrasion and short-circuit risk from exposed contacts. It is also suitable for wrapping cylindrical cell packs used in power tools and DIY battery rebuilds.
What temperature and tool do I need to shrink this tubing?
PVC heat shrink tubing typically activates at around 70–90°C (158–194°F). A heat gun set to low or medium is the recommended tool. Keep the heat gun moving steadily along the length of the tubing to apply even heat and avoid scorching. Avoid using open flames such as lighters or torches, as these can unevenly shrink or damage the material.
Can I cut this tubing to a shorter length before applying?
Yes. Each piece is sold in a 1-meter (≈39.4") length and can be cut to any shorter length with scissors or a utility knife before applying heat. Cut cleanly and squarely for the neatest finish. This allows you to get multiple shorter wraps from a single piece, reducing waste on smaller battery packs or connectors.
Does the color affect the insulation or electrical performance?
No. The color is purely aesthetic and does not affect the electrical insulation properties or shrink performance of the tubing. Color-coding is useful for organizing wire bundles, identifying battery packs by cell count or voltage, or matching the color scheme of your RC vehicle or electronics build.
🛒 Select your diameter and color above, then add to cart — ships from our US warehouse.
