See alternate Saturated Dam Method for specialty applications such as running water, vertical conduit, or other complex/unusual geometries.

FST™ FOAM DUCT SEALANT INSTRUCTIONS

FST™ FOAM DUCT SEALANT INSTRUCTIONS

FST Foam Seal Application and Use

Polywater® Foam Sealant FST cures to a strong, rigid closed-cell structure. It has excellent wetting and adhesion to metal, concrete and plastic surfaces. It holds 20 feet (6 meters) water- head, and acts as a barrier to smoke and air. It provides superior resistance to water, acids, greases and bases and most organic compounds. Performance and test results can be found in the FST Tech Data Sheet and Lab Reports.

    Installation Tips

  • Conduit cleaning and preparation is key to a good seal.
  • Rapid injection will produce better mixing.
  • For large ducts, use multiple injections. See Quantity Recommendation.
  • Mixing nozzle is reusable 7-10 minutes after injection.

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