Silicone Rubber Heat Shrink Tubing φ0.8–60mm | 2500V Flexible Wire Sleeving

Measure the outer diameter of the wire or connector you need to cover, then choose a tube size that is slightly larger before shrinking. Silicone heat shrink tubing typically has a 2:1 shrink ratio, so a φ10mm (≈3/8") tube will shrink down to approximately φ5mm (≈3/16"). For example, if your wire bundle measures 4mm, choose the φ8mm or φ10mm size to ensure a snug, secure fit after shrinking.

This silicone rubber heat shrink tubing is rated at 2500V, making it suitable for most low- to medium-voltage electrical insulation applications including automotive wiring, home electronics, and DIY electrical repairs.

Yes. Silicone rubber is generally resistant to UV exposure, moisture, and temperature extremes. It typically performs well in temperatures ranging from approximately -60°C to +200°C (-76°F to +392°F), making it suitable for outdoor wiring, engine bays, and other demanding environments where standard PVC tubing would fail.

Yes. With sizes ranging from φ0.8mm to φ60mm, this tubing is compatible with a wide range of wire gauges, connectors, terminals, and cable bundles. The smallest sizes suit fine electronics wiring, while the larger diameters work well for cable bundles and conduit applications. If you are unsure, contact us to confirm compatibility with your specific connector or wire gauge.

A heat gun is the recommended tool for even, controlled shrinking. In most cases, a temperature of around 120°C–150°C (248°F–302°F) is sufficient to activate the shrink. A lighter or hair dryer can work for smaller sizes in a pinch, but a heat gun gives the most consistent results and reduces the risk of scorching the tubing or the wire insulation underneath.

Color choice is generally a matter of preference or wiring convention. White and gray are common for general-purpose use, while red, iron red, and yellow are often used for positive leads or high-visibility marking. Blue is frequently used for neutral or signal wires. Choose based on your wiring color code or project aesthetics — all colors share the same electrical and thermal performance.

The thickened wall variants (such as "iron red thickened" and "thick gray") offer greater mechanical protection and abrasion resistance compared to standard wall tubing. They are a good choice when the cable is exposed to physical wear, sharp edges, or repeated flexing. The "bright red 0.5mm wall thickness" variant is a thinner-walled option suited for applications where flexibility and minimal added bulk are priorities.