PVC Heat Shrink Tubing 45mm–625mm | Large Diameter Heat Shrinkable Film

Measure the outer diameter of the object you want to cover, then choose a tubing size that is typically 20–50% larger than that measurement. PVC heat shrink tubing generally shrinks to about 50% of its supplied diameter when heat is applied. For example, if your pipe or bundle measures 40mm (≈1.6") across, a 45mm or 50mm tube would generally be a good starting point. For larger objects — say a 200mm (≈7.9") pipe — select the 220mm or 228mm size to allow easy installation before shrinking.

This tubing typically has a 2:1 shrink ratio, meaning it shrinks to approximately half its original supplied diameter when heat is applied. The exact ratio may vary slightly by size — please contact us if tight tolerances are required for your specific application.

PVC heat shrink tubing generally provides a degree of moisture resistance and is suitable for light-duty outdoor use. However, it is not rated for prolonged UV exposure or full submersion. For harsh outdoor, waterproof, or marine applications, we recommend using adhesive-lined polyolefin heat shrink tubing instead. Contact us if you need guidance on the right product for your environment.

This tubing typically begins to shrink at around 70–90°C (158–194°F). A heat gun set to low or medium is generally sufficient for even, controlled shrinking. Avoid using an open flame directly on the tubing, as it can scorch or melt the material unevenly and may cause uneven shrinkage.

Yes — the wide size range from 45mm to 625mm is designed to accommodate a broad variety of standard pipe diameters, conduit sizes, and cable bundle dimensions commonly used in residential, commercial, and industrial settings in the US and internationally. If you are unsure which size fits your specific pipe or conduit, contact us with your outer diameter measurement and we will help you select the right option.

In addition to diameter shrinkage, PVC heat shrink tubing typically experiences some longitudinal (lengthwise) shrinkage — generally around 5–15% in length. For a 1-meter piece, this means you may end up with approximately 85–95cm (≈33–37") of finished coverage after shrinking. Plan accordingly and cut your piece slightly longer than your target coverage length before applying heat.

PVC heat shrink tubing provides basic electrical insulation and is commonly used for bundling wires, covering battery terminals, and protecting cable connections in low-voltage applications. For high-voltage or safety-critical electrical applications, please contact us to verify the voltage rating before ordering, as ratings can vary by size and wall thickness.