Blue PVC heat shrink tubing for 18650 batteries — flame-retardant insulation for battery packs
Building or rebuilding a battery pack and need a wrap that holds securely, insulates properly, and won’t catch fire? This blue PVC heat shrink tubing for 18650 batteries is just the job. It shrinks evenly around your pack with zero bubbles and no weak spots — staying put for years to come.
Note: The price shown is for 1 metre of tubing. Choose the right width for your pack: 250mm or 300mm (flat width before shrinking).
Why choose this model? (Key benefits):
- Certified flame-retardant — self-extinguishing PVC material won’t propagate flames, making it essential for any Li-ion or LiFePO4 pack
- Two widths available — 250mm suits narrower packs (2–3 cells in parallel), while 300mm accommodates wider configurations without leaving exposed edges
- Strong and uniform shrinkage — the film molds tightly to the shape of your pack, eliminating internal shifting that causes terminal wear
- High-clarity transparent blue PVC — the blue colour makes it easy to visually identify battery types in multi-pack setups without needing extra labels
- Sold by the metre — buy precisely what you need with zero waste, ideal for single builds or small-scale production alike
- Moisture and dust resistant — seals your pack off from the outside environment, helping to extend cell lifespan
Details and Performance
Tubing is crafted from heat-shrinkable PVC packed with flame-retardant additives, tested and proven for use with 18650 lithium-ion cells and similar battery packs. When heat is applied using a heat gun or heat tunnel, the film shrinks down smoothly and bonds firmly to the pack’s surface, preventing air gaps that could otherwise cause condensation. The shrink ratio ensures complete coverage across a range of diameters and widths within each variant’s specs.
| Parameter | Value / Detail |
|---|---|
| Material | Flame-retardant heat shrink PVC |
| Colour | Blue (gloss finish) |
| Flat width | 250mm or 300mm (select your option) |
| Length per piece | 1 metre |
| Film thickness | ~0.08–0.12mm (before shrinking) |
| Recommended shrinking temperature | 90°C – 120°C |
| Max operating temperature | ~105°C |
| Flame-retardant properties | Self-extinguishing, flame retardant |
| Dielectric strength | Electrical insulator |
| Main applications | 18650 battery packs, Li-ion, LiFePO4, NiMH |
| Sales unit | 1 metre / piece |
Instructions for Use
- Measure your battery pack’s length and cut the tubing 10–15mm longer than the pack at each end.
- Slide the assembled pack into the tubing, making sure it is evenly centered.
- Using a heat gun set to 100–120°C, apply heat in sweeping circular motions from the middle out towards the ends — avoid lingering in one spot.
- Allow the tubing to cool for 1–2 minutes before handling.
- If the ends remain open, fold them over and seal with an extra burst of heat or use insulating end disks.
Package Contents
- 1 metre of blue flame-retardant PVC heat shrink tubing
- Selected width: 250mm or 300mm (per your order choice)
Frequently Asked Questions
Which width should I choose for my 18650 battery pack?
That depends entirely on your pack’s layout. The 250mm flat-width tubing fits packs up to ~150mm wide after shrinking. The 300mm option is best suited for wider or thicker configurations. Measure your pack’s circumference and divide by 2 — the result should be smaller than your chosen tube’s width.
Can I use a standard hairdryer instead of a heat gun?
Technically yes, but household hair dryers don’t reach the temperatures required for an even shrink. The finish will turn out patchy and the tubing won’t seal down fully. We strongly recommend using a heat gun of at least 300W for professional results.
Is this tubing genuinely flame retardant or just heat resistant?
It’s a self-extinguishing flame retardant — it won’t propagate flames and will put itself out once the heat source is removed. While not entirely non-combustible, it fully complies with safety standards for lithium battery pack builds.
Can I order multiple metres? Does the price change?
Yes, simply add your desired quantity to the basket — each unit equals 1 metre. The tubing will be dispatched as a single continuous length matching your total order.
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