Measure the total length of the area you need to cover, then add at least 10–15% extra to account for shrinkage and overlap. For battery packs, measure the full cell or module length. Available options are 1 meter (≈39.4"), 2 meters (≈78.7"), and 3 meters (≈118.1"). If you're unsure, ordering the next size up gives you room to trim.

This type of tubing typically has a 2:1 shrink ratio, meaning it shrinks to approximately half its original expanded diameter when heat is applied. At a 475mm flat width, the expanded circumference is approximately 950mm — after shrinking, it will conform tightly around the target object. Always verify your pack's outer circumference fits within the expanded diameter before cutting.

Standard heat shrink tubing generally provides moisture resistance suitable for indoor and light outdoor use. It is not typically rated for full submersion. For applications exposed to heavy moisture, rain, or condensation, an adhesive-lined (dual-wall) heat shrink is generally recommended. Contact us to confirm the moisture rating for this specific product.

Activation typically occurs between 90°C–120°C (194°F–248°F). A heat gun on a low or medium setting is the most reliable tool. A hair dryer may not reach sufficient temperature for full, even shrinkage and is generally not recommended for large-diameter tubing. Avoid open flames, which can cause scorching or uneven results.

At 475mm flat width, this tubing is designed for large battery modules and multi-cell pack assemblies — not individual small-format cells like 18650 or 21700. It is generally suited for wrapping grouped cell assemblies, bus bar insulation, or full pack outer sleeves. For individual cell wraps, see our smaller-diameter heat shrink options.

No. Both Black and Blue variants are made from the same base material and offer identical insulation and shrink characteristics. Color selection is purely for visual identification, organization, or aesthetic preference — useful when color-coding different circuits or battery strings in a multi-pack build.

Yes. Cut the tubing with sharp scissors or a utility knife before applying heat. Cut slightly longer than your target coverage area, slide it into position, then apply heat evenly from one end to the other. Once shrunk, the tubing cannot be repositioned, so confirm placement before heating.