Heat shrink 35 mm

Start by selecting the inner diameter, length, color, and shrink ratio that match your wiring needs. For example, a 12.0 mm inner diameter tube shrinks to about 6.0 mm with a 2:1 ratio, and is sold in 10 cm lengths in multiple colors (black, blue, green, red, white, yellow). This makes it easy to tailor insulation for different cables and fitments while staying within a compact footprint.

A 2:1 shrink ratio means the tubing will shrink to half of its supplied diameter, providing a snug, protective wrap around the cable. This tight fit is crucial for preventing moisture ingress and reducing abrasion. When selecting, measure the wire or connector and choose a tube that will shrink to the target diameter under heat without leaving gaps.

Most tubes in this range are polyolefin heat shrink sleeves. Typical operating temperatures span 55°C to +125°C, with shrink temperatures around +70°C to +110°C. These specs help you plan for electrical insulation and environmental conditions. The tubes are flame-retardant and offer a dielectric strength of about 15 kV/mm, indicating good insulation performance for many common electrical applications.

There are several ready-to-use kits: a compact 4-color/12 mm tube set of 10 cm length, larger 20 cm tubes with multiple inner diameters, and expansive bundles like a 328-piece kit with 4 colors across eight sizes. Beginners typically start with the 328-piece kit to cover many common sizes, while hobbyists may grab a few single-diameter lengths for specific projects. These options simplify stocking the essentials for insulation tasks.

These heat shrink tubes provide electrical insulation with a dielectric strength suited for typical wiring tasks and flame retardant properties for safer use. Install by sliding the tube over the cable, applying heat with a heat gun or appropriate tool until the tube tightens around the wire. Maintain a steady, even heat to prevent uneven shrinkage and avoid overheating adjacent components. Always separate power during installation to ensure safety.

After shrinking, the final diameter depends on the initial inner diameter and the 2:1 ratio. For a 12.0 mm ID tube, you should expect a final inner diameter close to 6.0 mm, assuming proper heat application. This predictable behavior helps you plan for cable protection, ensuring the wrapped section fits precisely without adding bulk. Always verify the shrunk size with a quick test on a spare sample before applying it to critical assemblies.