0.8mm 2:1 Heat Shrink Tubing – Fine Wire Insulation Sleeve

0.8mm heat shrink tubing (pre-shrink inner diameter) is designed for very fine wire gauges, typically in the 28–32 AWG range. After heat is applied, the 2:1 shrink ratio reduces the inner diameter to approximately 0.4mm, creating a snug fit around the conductor. Always measure your wire's outer diameter before ordering — if your wire OD is close to or larger than 0.8mm, size up to a larger tube.

A 2:1 ratio means the tubing shrinks to approximately half its original inner diameter when heat is applied. This 0.8mm tube shrinks down to roughly 0.4mm (≈1/64"), conforming tightly around fine wire leads, PCB pins, or micro connectors. Once shrunk, the tubing does not return to its original size, so always cut a piece slightly longer than the area you need to cover.

This polyolefin heat shrink tubing generally provides good resistance to moisture and humidity, making it suitable for light outdoor and indoor electronics applications. For fully waterproof or submersed installations (e.g., marine or underground wiring), we recommend using adhesive-lined heat shrink tubing instead, and contacting us to confirm suitability for your specific use case.

This tubing is designed for low-voltage DC applications typically found in hobby electronics, PCB work, and small signal wiring. It is generally suitable for circuits operating at standard logic and battery voltages (3.3V, 5V, 12V). For higher voltage or mains AC applications, contact us to confirm suitability before use.

For a single repair or small PCB project, 1 meter (≈39") is generally sufficient. For ongoing hobby builds or workshop stock, 5M (≈197") or 10M (≈394") offers better value. For production runs or bulk wiring jobs, 20M (≈787"), 30M (≈1181"), or 50M (≈1969", Black only) provides the best per-meter cost. Many electronics hobbyists keep a 10M roll of each color on hand for quick access.

No — all color variants share the same 2:1 shrink ratio and electrical insulation properties. Color is used purely for wire identification and organization. Using different colors for different signal lines or voltage rails (e.g., red for power, black for ground, blue for signal) is a standard practice in electronics assembly and makes troubleshooting significantly faster.

A heat gun with a concentrator nozzle set to a low or medium setting is the recommended tool for even, controlled shrinkage. A hot air rework station gives the most precise control for PCB work. This tubing typically activates at around 90°C (194°F). Avoid open flames — at 0.8mm diameter, the tubing is susceptible to scorching or uneven shrinkage from direct flame exposure.