Heat shrink 15 mm

First, match the tube’s inner diameter to the wire you need to cover. In this range you’ll find 15 mm inner-diameter options in lengths up to 5 meters, plus multi‑diameter sets that span several sizes. Material is polyolefin, which provides insulation, and the common shrink ratio is 2:1, so the final diameter is about half the supplied size. Also check temperature ratings (55°C to 125°C) and dielectric strength (around 15 kV/mm) for reliable insulation in electrical work.

The shrink ratio determines how much the tube narrows when heated, affecting how well it fits around cables and connectors. A 2:1 ratio means a tube starting at 15 mm could shrink to about 7.5 mm, which is crucial for snug insulation. Temperature ratings tell you the safe operating range; for typical electrical tasks, you want a tube that conducts heat safely up to +110°C and maintains integrity up to +125°C in continuous use.

If you work with different wire diameters or want flexibility for future projects, a multi-size set is ideal. For example, one option covers diameters from 3 mm to 15 mm across eight sizes, while other assortments pair 12 mm, 6 mm, and 4 mm tubes in a 20‑piece or larger collection. Multi-size sets save you from buying multiple singles and let you pick the best-fitting sleeve on the job.

Cut the tube to a length a little longer than the joint you’re insulating, slide it over the section you’re protecting, then apply heat evenly with a heat gun. Keep the gun moving and heat until the tube fully shrinks to the target diameter; use a temperature around the full shrink threshold (+110°C) to ensure a tight seal. Allow cooling before handling to prevent loosening or gaps.

Color options include classic Black and a range of multicolor sets, depending on the size package. Color helps with wire identification and organization in complex assemblies. Since all options use polyolefin and provide flame retardant properties, you can prioritize color for visibility without sacrificing insulation performance.

Estimate the number of wires and the variety of diameters you’ll encounter to decide between singles vs. assortments. For automotive or panel work, a long 5 m tube is handy; for quick repairs, a 1 m length may suffice. If you’re insulating multiple sizes, pick a set that includes several diameters (for example 3–15 mm) across multiple pieces to cover common needs without reordering.