Safe Use of Heat Shrink Tubing

Key Hazards

• Burns from heat guns, torches, or heated tubing
• Fire from nearby combustibles or heat transfer
• Fumes from overheated tubing, insulation, or coatings
• Electrical shock if conductors are not de-energized
• Damage to nearby wires, insulation, or components
• Hot surfaces handled too soon after heating

2–3 Minute Talk Script

Heat shrink tubing is commonly used for electrical insulation, labeling, sealing, and repairs. The main hazards come from heat, fumes, fire risk, and electrical exposure.

Before work begins, workers should confirm that electrical conductors are de-energized when required. Heat shrink should not be applied in a way that exposes workers to energized parts.

The heat source should match the task. Heat guns, torches, and other tools create different levels of heat and fire risk.

Combustible materials should be removed or protected. Paper, cardboard, dust, insulation, rags, plastic, fuel, and nearby coatings can ignite or melt.

Workers should avoid overheating the tubing or surrounding material. Excessive heat can damage insulation, produce fumes, or weaken nearby components.

Ventilation should be considered when heating plastics, adhesives, coatings, or unknown materials. Workers should avoid breathing smoke or fumes.

Heated tubing, wires, terminals, and nearby surfaces can remain hot after the tool is turned off. Workers should allow cooling time before handling.

Safe heat shrink use depends on electrical isolation, controlled heat, fire prevention, ventilation, and protecting hands from hot materials.

Safety Reminders

• Confirm electrical energy is controlled when required.
• Use the correct heat source for the task.
• Keep heat away from combustibles.
• Avoid overheating tubing, wires, and insulation.
• Provide ventilation when fumes may be present.
• Protect hands from hot surfaces.
• Allow tubing and nearby parts to cool before handling.

Ask the Crew

• Are the conductors de-energized or otherwise safe to work on?
• Is the heat source appropriate for the area?
• What combustible materials are nearby?
• Could overheating create fumes or damage insulation?
• What PPE is needed for heat or electrical hazards?