Mechanical Insulator how-to

How to Firestop a Pipe Penetration

Firestops stop fire spread.

Updated By the Career Education Institute Curriculum Team
Quick answer

Firestops stop fire spread. In short: check; clean; install, then complete the remaining steps below.

Step by step

  1. Check the system.

  2. Clean the opening.

  3. Install packing.

  4. Apply firestop sealant.

  5. Label.

  6. Inspect.

Safety reminders for mechanical insulators

  • Wear respirators
  • Follow abatement rules
  • Use fall protection
  • Avoid hot surfaces

Pipe insulation · Jacketing · Fitting cover · Mineral wool · Calcium silicate · Vapor retarder: see the full mechanical insulator glossary.

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