7mm PVC Heat Shrink Tubing — Multi-Color Wire & Battery Sleeve (1–200m)

Measure the total run of wire or battery leads you need to cover, then add 10–15% for trimming and overlap. For single repairs or hobby projects, 1–5 meters is typically enough. For wiring harnesses or battery pack builds, 10–50 meters is generally a better fit. The 100m and 200m rolls offer the best per-meter value for ongoing workshop or production use — for example, 100 meters (≈328 ft) covers a substantial amount of wiring in one order.

This tubing has a typical 2:1 shrink ratio. Starting at 7mm (≈9/32") inner diameter, it generally shrinks down to approximately 3.5mm (≈9/64") when heat is applied. In practice, this means it fits snugly over wires and cables with an outer diameter of roughly 3mm–6mm before shrinking. Always measure your wire's outer diameter to confirm compatibility.

Standard PVC heat shrink tubing provides basic moisture resistance and performs well in indoor and light-duty outdoor applications. For prolonged outdoor exposure, direct water contact, or high-humidity environments, an adhesive-lined (dual-wall) or polyolefin heat shrink tubing is generally recommended for a more watertight seal. If you're unsure, contact us to confirm the best option for your environment.

7mm supply-diameter heat shrink tubing is typically compatible with single conductors from approximately 10 AWG down to 18 AWG, or bundled cables up to about 6mm in outer diameter. For connectors or multi-conductor bundles, measure the outer diameter of the assembled bundle — if it's under 7mm, this tubing will slide over and shrink down cleanly.

PVC heat shrink tubing of this type generally activates between 70°C–120°C (158°F–248°F). A heat gun set to low or medium is the most reliable tool — move it steadily along the tubing to avoid hot spots. A lighter or match can work for very short sections in a pinch, but a heat gun gives more even shrinkage and reduces the risk of scorching the tubing or the wire insulation beneath it.

Color coding is a standard practice in electrical and electronics work. Common conventions in the US include: Black for ground/negative, Red for positive/live, Blue for neutral or secondary circuits, Yellow for signal or caution wires, White for neutral in AC wiring, and Transparent when you want the underlying wire color to remain visible. Always follow the wiring standards applicable to your specific application and local electrical code.

Yes — 7mm PVC heat shrink tubing is well suited for protecting battery lead wires, solder joints, and nickel strip connections on battery packs. It is commonly used in DIY 18650 and similar lithium battery pack builds to insulate individual lead wires and spot-weld tabs. Note that for wrapping the full outer body of an 18650 cell (18mm diameter), you would need a wider-diameter tubing. The 7mm size is ideal for the wiring and connection points, not the cell body itself.