PVC Heat Shrink Tubing — Reliable Insulation and Color-Coding for Battery Packs and Wiring Projects
Whether you're rebuilding a battery pack, organizing a wiring harness, or protecting bare conductors, finding tubing that fits cleanly and shrinks evenly can be frustrating. Loose fits, limited color options, and tubing that splits under heat are common complaints. This PVC heat shrink tubing is designed for hobbyists, electronics repair technicians, and DIY builders who need a dependable, color-accurate solution across a wide range of diameters.
Each order includes 1 meter (≈39.4") of PVC heat shrink tubing in your chosen size and color. Sizes range from 7mm (≈9/32") to 40mm (≈1-9/16"), with a wall thickness of 0.1mm before shrinking. The tubing is available in 28 colors including Black, White, Transparent, Red, Blue, Green, Yellow, and specialty shades like Transparent Gold, Military Green, and Lake Blue — making it easy to match or color-code any project.
Typical use cases include wrapping 18650 lithium battery cells and custom battery packs, insulating and color-coding automotive wiring and low-voltage DC circuits, and protecting solder joints and terminal connections in electronics repair and RC hobby builds.
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Compatibility Note: This tubing is designed for low-voltage electrical insulation and mechanical protection. Sizes 7mm–40mm cover most standard battery cell formats (including 18650, 21700, and custom packs). Always measure your component's outer diameter before selecting a size — the tubing shrinks to approximately half its listed diameter when heat is applied.
✅ Key Features of These PVC Heat Shrink Tubes
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📏12 Diameter Options — Available from 7mm to 40mm, covering battery cells, wire bundles, and connector sleeves across a wide range of DIY and repair applications.
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🎨28 Color Choices — From standard Black and White to Transparent Gold and Military Green, enabling precise wire color-coding and polarity identification in complex wiring harnesses.
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🔥Low Activation Temperature — PVC formulation typically activates between 70°C–90°C (158°F–194°F), compatible with standard heat guns and even careful use of a hair dryer for light applications.
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⚡Electrical Insulation — Provides a snug, insulating sleeve around solder joints, bare wire ends, and terminal connections, reducing the risk of shorts in low-voltage DC circuits.
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🔋Battery Pack Wrapping — Sized to fit common lithium cell formats; the 18.5mm size is particularly suited for 18650 cells, while larger sizes accommodate custom battery pack assemblies.
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✂️Easy to Cut and Apply — Flexible PVC material cuts cleanly with scissors or a utility knife, and the 1-meter length gives you enough material to complete multiple connections or wrap a full battery pack in a single order.
📐 Technical Specifications — PVC Heat Shrink Tubing
| Material |
PVC (Polyvinyl Chloride) |
| Available Sizes (Inner Diameter) |
7mm, 9mm, 12mm, 15mm, 17mm, 18.5mm, 23mm, 27mm, 29.5mm, 31mm, 36mm, 40mm |
| Wall Thickness (Before Shrink) |
0.1mm |
| Length per Unit |
1 Meter (≈39.4") |
| Shrink Ratio |
Typically 2:1 (shrinks to approximately half the listed diameter) |
| Activation Temperature |
Typically 70°C–90°C (158°F–194°F) |
| Available Colors |
28 colors — see variant options |
| Voltage Rating |
See variant options / Contact us to confirm for specific applications |
| Recommended Tool |
Heat gun (low to medium setting) |
| Suitable Applications |
Battery pack wrapping, wire insulation, color-coding, solder joint protection |
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Sizing Tip: Select a tubing diameter that is slightly larger than your component's outer diameter so it slides on before shrinking. After heat is applied, the tubing will shrink to approximately half its listed size. If you're unsure, size up — you can always apply more heat, but you can't reverse an over-shrunk tube.
❓ Frequently Asked Questions
How do I choose the right diameter for my application?
Measure the outer diameter of the object you want to cover before shrinking. Choose a tubing size that is slightly larger than that measurement — typically 10–20% larger — so it slides on easily. After heat is applied, PVC heat shrink tubing generally shrinks to approximately half its original diameter, so a 20mm tube will typically shrink down to around 10mm. When in doubt, size up.
What is the shrink ratio of this PVC tubing?
PVC heat shrink tubing generally has a 2:1 shrink ratio, meaning it shrinks to approximately half its listed diameter when heat is applied. For example, a 23mm (≈29/32") tube will typically shrink down to around 11–12mm (≈7/16"). This makes it suitable for a wide range of battery cell and wire bundle sizes.
What temperature is needed to shrink this tubing?
PVC heat shrink tubing typically activates at temperatures between 70°C–90°C (158°F–194°F). A heat gun set to low or medium is the recommended tool. Move the heat gun evenly along the tubing to avoid hot spots. Avoid open flames, as they can scorch or melt the material unevenly and may cause uneven shrinkage.
Can this tubing be used outdoors or in wet environments?
PVC heat shrink tubing provides basic moisture resistance and is generally suitable for light indoor use and short-term outdoor exposure. For prolonged outdoor use, submersion, or applications requiring a waterproof seal, a dual-wall adhesive-lined heat shrink tubing is typically recommended. In most cases, this PVC tubing works well for protected outdoor wiring where direct water contact is not expected.
Is this tubing compatible with standard battery pack sizes like 18650 cells?
Yes. The size range of 7mm to 40mm covers most common battery cell and pack configurations. For example:
- 18650 cells — typically use the 18.5mm size
- 21700 cells — typically use the 23mm size
- Custom battery packs — generally use 27mm–40mm depending on pack width
Always measure your battery or pack's outer diameter before ordering to confirm the right fit.
Can I use this for wire color-coding and electrical insulation?
Yes. With 28 available colors, this tubing is well-suited for wire color-coding in automotive wiring, electronics projects, and DIY wiring harnesses. It provides basic electrical insulation for low-voltage DC applications. For high-voltage or industrial electrical work, verify the voltage rating with us before use — contact us to confirm suitability for your specific application.
How much tubing do I get per order, and can I order multiple meters?
Each unit includes 1 meter (≈39.4") of heat shrink tubing in your selected size and color. To get more than 1 meter, simply increase the quantity at checkout. Each additional unit adds another 1 meter of the same size and color.
🛒 Select your size and color above, then add to cart — ships from our US warehouse.
