Unique-Bargains heat shrink tubing 3 mm 10 m 33 ft black

Wire insulation tubing for cables

This black polyolefin heat-shrink tubing comes in a 10 metre roll with a 3 mm pre-shrink diameter. It is suited to hobbyists, technicians and automotive installers who need reliable insulation for wire splices, connector ends or small harnesses. The VW-1 flammability rating confirms it meets a recognised vertical-wire flame test. The thin wall keeps the assembly light at 35 g total weight.

Behaviour under sustained heat

The material is rated for continuous operation at 125°C and shrinks at a low temperature to protect temperature-sensitive components during installation. Once recovered it maintains its insulation properties without becoming brittle during long-term thermal cycling. The thin wall allows rapid heat transfer so the tubing conforms quickly and evenly along the joint. The VW-1 rating indicates self-extinguishing performance if the harness is exposed to flame.

Check your wire gauge before ordering

Verify that the 3 mm supplied diameter will slide over your largest connector or splice before shrinking. Confirm the post-shrink diameter suits the finished bundle size you require. Ensure your heat source can reach the low shrink temperature without damaging adjacent insulation. The single 10 metre length may not be sufficient for large looms or multiple vehicle harnesses.