Heat shrink 18 mm

For this size, choose a heat shrink sleeve made from durable polyolefin, with a shrink ratio that matches your needs. An 18 mm sleeve may be supplied in a one-meter length in this range, and it’s often available in blue or red depending on the model. The most common shrink ratio is 2:1, meaning the sleeve can shrink to about half of its original diameter—providing effective insulation and enhanced protection.

In this product line, you’ll find blue and red options for 18 mm inner diameter, generally available in one-meter lengths. The color variety can help you code cables by use or equipment. Other sets may include multi-color combinations and different lengths, but for the 18 mm size, blue and red are the most common and easiest to spot in the assortment.

Measure your cable’s outer diameter and choose a sleeve whose inner diameter is slightly larger than the measured cable diameter. This ensures effective shrinkage without forcing. Prefer a 2:1 shrink ratio so it can reduce down to about half of its original diameter after heat exposure. Also check the maximum operating temperature, otherwise it may not be suitable for your setup.

These sleeves support common working temperatures, with a range of about 55°C to above 125°C. They remain robust in heat and provide long-lasting insulation. The polyolefin material is designed to withstand electrical environments, helping reduce the risk of short circuits and protecting connections and wires from mechanical damage.

Cut the extra sleeve to your desired length, then slide it onto the cable segment before applying the heat needed for shrinkage. Using scissors or a sharp cutting tool helps you make a clean cut and avoids bunching. Once heated, the sleeve tightens around the cable, delivering durable insulation and protection against wear and friction.

These sleeves secure and protect cables during repairs or extensions, help insulate sensitive connections, and allow neat cable organization for electronics, IT, or smart home projects. They’re ideal for applications such as reinforcing a power connection, protecting cables around a mounting setup, or replacing damaged cable sleeving.