PVC Heat Shrink Tubing 125–625mm | Large Diameter Shrinkable Film Insulation Sleeve

The flat width listed (e.g., 125mm) is the width when the tube is laid flat. The inner diameter before shrinking is approximately half the flat width. As a general rule, choose a tube whose pre-shrink inner diameter is at least 10–20% larger than the object you need to cover. For example, a 125mm flat width tube has an inner diameter of roughly 80mm (≈3.1"): suitable for objects up to about 70mm in diameter. Always check the variant label which shows both flat width and inner diameter (Ø).

PVC heat shrink tubing generally has a shrink ratio of approximately 2:1, meaning it shrinks to roughly half its original diameter when heat is applied. The exact ratio can vary slightly by wall thickness and color variant. Thickened variants typically maintain the same shrink ratio but provide greater wall thickness after shrinking.

PVC heat shrink tubing typically begins to shrink at around 70–90°C (158–194°F) and achieves full shrinkage at approximately 100–120°C (212–248°F). A heat gun set to low or medium is generally sufficient. Avoid open flames, as uneven heat can cause uneven shrinkage or damage the material.

PVC heat shrink tubing generally provides good moisture resistance and is suitable for light outdoor use. However, it is not rated for prolonged UV exposure or submersion. For harsh outdoor or marine environments, a polyolefin or adhesive-lined heat shrink tubing is typically recommended. Contact us to confirm suitability for your specific application.

The thickened variants (e.g., Blue Thickened, Transparent Thickened) have a greater wall thickness before and after shrinking, providing additional mechanical protection, abrasion resistance, and insulation. They are generally preferred for applications where the covered object may experience physical stress or where extra insulation is needed.

Yes. Each listing is sold per 1-meter length, and PVC heat shrink tubing can be cut to any shorter length with scissors or a utility knife before or after shrinking. For longer runs, simply order multiple meters and butt-join sections as needed.

Large-diameter PVC heat shrink tubing is commonly used for bundling and insulating wire harnesses, protecting pipe joints and fittings, covering battery packs, wrapping tool handles, labeling and color-coding large cables, and providing a protective sleeve over hoses or conduit. The wide size range (125mm–625mm flat width) makes it suitable for both light DIY tasks and heavier industrial applications.