PVC Heat Shrink Tubing for RC Battery Packs — 7mm to 500mm, White/Black/Clear/Green

Measure the circumference of your battery pack, then divide by 2 to get the required flat width. For example, a pack with a 100mm circumference needs approximately 50mm flat width. As a general rule, choose a size that is 10–20% larger than the calculated flat width so the tubing slides on easily before shrinking. The inner diameter (φ) shown in each variant name indicates the approximate pre-shrink opening — for instance, "50mm (φ32mm)" means the tubing lies flat at 50mm and has a roughly 32mm opening before heat is applied.

PVC heat shrink tubing typically has a 2:1 shrink ratio, meaning it shrinks to approximately half its original flat width when heat is applied. Longitudinal (length) shrinkage is generally less than 5%, so a 1M piece will typically remain close to 1M after shrinking. The exact ratio can vary slightly by size; contact us if you need confirmation for a specific variant.

PVC heat shrink tubing generally activates between 70°C and 90°C (158°F–194°F). A heat gun set to low or medium is the recommended tool — it provides even, controlled heat. A hair dryer can work for smaller sizes but may not reach sufficient temperature for larger flat widths. Avoid open flames, as they can scorch or melt the material unevenly and create hot spots.

PVC heat shrink tubing provides good moisture resistance and is generally suitable for indoor and sheltered outdoor use — for example, RC car battery packs used in typical weather conditions. For prolonged direct outdoor exposure, submersion, or harsh chemical environments, a polyolefin or adhesive-lined heat shrink tubing is typically a better choice. Contact us to confirm suitability for your specific application.

This PVC heat shrink tubing is compatible with LiPo, LiHV, NiMH, NiCd, Li-Ion, and most other RC battery pack formats. It functions as a passive insulating sleeve over the battery cells and does not interact chemically with the battery. Always ensure the pack is fully discharged and at room temperature before applying heat during the wrapping process.

Yes — this is a general-purpose PVC heat shrink tubing. Common uses beyond RC battery pack insulation include wire bundling and cable management, connector and terminal protection, automotive wiring harness repair, DIY electronics projects, and labeling cables by color. The wide size range from 7mm to 500mm flat width makes it useful for everything from small gauge wires to large cylindrical objects.

The relationship between flat width and object diameter is: Flat Width ≈ Object Diameter × π ÷ 2, or simplified: Flat Width ≈ Object Diameter × 1.57. So for a 20mm diameter battery pack, you'd need approximately 31mm flat width. Each variant in this listing shows both the flat width and the approximate inner diameter (φ) to make selection straightforward. When in doubt, size up by one step.