PVC Heat Shrink Tubing Black Wrap Sleeve — 7mm to 285mm, Battery & Wire Insulation

Measure the diameter of your wire, cable, or battery pack, then multiply by approximately 1.5–2× to get the flat width you need. For example, a 10mm diameter object typically needs a flat width of around 15–20mm. When in doubt, size up — PVC heat shrink tubing generally shrinks to about 50% of its flat width when heated. For battery packs, measure the full pack circumference and divide by 2 to get the minimum flat width required.

This 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. This is generally sufficient for most wire bundling, battery wrapping, and cable insulation applications. For tighter conformance over irregular shapes, apply heat evenly and work from one end to the other.

PVC heat shrink tubing generally activates at temperatures around 70–90°C (158–194°F). A heat gun set to low or medium is recommended. Avoid open flames, as they can scorch or unevenly shrink the material. Keep the heat gun moving to prevent hot spots, especially on larger diameter sizes.

PVC heat shrink tubing provides basic moisture resistance and is suitable for light indoor and sheltered outdoor use. For prolonged outdoor exposure, UV-heavy environments, or submersion, a polyolefin or adhesive-lined heat shrink tubing is generally recommended for better long-term protection. If you're unsure, contact us to discuss your specific application.

Yes, PVC heat shrink tubing is widely used for wrapping 18650 cells, battery packs, and battery holders. The larger flat widths (e.g., 50mm–285mm) are particularly suited for multi-cell packs and large cylindrical or prismatic batteries. Always confirm the flat width matches your pack dimensions before ordering. A 1m sample length is a cost-effective way to test fit before committing to a longer roll.

For single wire or cable runs, 1–2 meters is typically sufficient for most DIY projects. For production runs, battery assembly, or wiring harnesses, 5–20 meter rolls offer better value per meter. We offer lengths from 1 meter up to 20 meters per roll so you can match your project scale without over-ordering. Note that PVC tubing does not shrink lengthwise — only in diameter — so your cut length stays consistent after shrinking.

PVC heat shrink tubing is generally rated for low-voltage applications, typically up to 600V AC. This makes it suitable for most household wiring repairs, automotive electrical work, and battery pack insulation. For high-voltage or industrial electrical applications, please contact us to confirm suitability for your specific use case.