2:1 Heat Shrink Tubing – PVC Insulation Sleeve | 103–350mm | 105°C Rated

Measure the outer diameter (OD) of your cable or connector before shrinking. With a 2:1 ratio, the tubing shrinks to roughly half its listed width. Choose a size where the pre-shrink diameter is at least 20% larger than your cable's OD for a snug fit. For example, a 110mm (≈4.3") tube shrinks down to approximately 55mm (≈2.2"). When in doubt, size up — you can always apply more heat, but you can't un-shrink the tubing.

This PVC heat shrink tubing is rated to 105°C (221°F) for continuous operation. It typically begins to shrink at around 70–90°C (158–194°F). A heat gun set to low or medium is generally sufficient. Move the heat gun slowly and evenly along the tubing to avoid hot spots. Avoid open flames, which can scorch or melt the material unevenly.

PVC heat shrink tubing generally provides good moisture resistance for indoor and sheltered outdoor use. For prolonged UV exposure, submersion, or harsh outdoor environments, an adhesive-lined polyolefin tubing is typically recommended instead. If your application involves direct water exposure, contact us to confirm suitability before ordering.

Yes. PVC heat shrink tubing is widely used for insulating copper and aluminum conductors in residential, automotive, and light industrial wiring. It is generally compatible with standard wire gauges, crimp connectors, butt splices, and ring terminals. Always verify the voltage rating of your specific application — contact us to confirm if you have high-voltage requirements.

PVC heat shrink tubing typically experiences minimal longitudinal (lengthwise) shrinkage — generally less than 5–10%. The primary shrinkage is radial (diameter). As a best practice, cut your piece slightly longer than the area you need to cover to account for any length change during the shrinking process.

Absolutely. Each piece is 1 meter (≈39.4") long and can be cut to any length with scissors or a utility knife before or after shrinking. Cut cleanly at a right angle for the neatest result. This makes it easy to cover multiple short splices from a single piece, reducing waste on smaller cable repair jobs.

No. Color is purely aesthetic and does not affect electrical insulation or thermal performance. All nine colors — Black, White, Yellow, Green, Blue, Red, Clear, Light Green, and Grey — share the same 2:1 shrink ratio and 105°C rating. Color-coding is commonly used to identify wire polarity, circuit type, or phase in multi-conductor wiring harness installations.