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Polyolefin Heat Shrink Tubing
Adhesive-lined Semi-Rigid Polyolefin Tubing-4:1

Adhesive-lined Semi-Rigid Polyolefin Tubing-4:1

NP-421 offers superb, unbeatable environmental protection and is ideal for a wide range of electrical wiring applications including wire splices, wire bundles and harness breakouts. Polyolefin heat shrink tubing provides a quick, easy and highly efficient protection solution against a variety of harsh environments for automotive, truck and marine wire splices, harness breakouts, and more.

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Additional Information

The heat shrink tubing shown on this page is semi-​rigid meaning that once the tubing has been shrunk, it loses its flexibility making it hard to bend or twist. It has a shrink ratio of 4 to 1 when heated to a temperature of 250°F (121°C) or above.

Key Features

  • Corrosive resistance: good
  • Resistance to fuels and oils: good
  • Resistance to fungus: excellent

Distinctive Characteristics of Polyolefin Heat Shrink Tubing 4:1 Semi-rigid adhesive lined

  • Minimum shrink temperature: 250°F (121°C)
  • Flammability: self extinguishing
  • Specific gravity: 1.25
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