Draft-Block Expanding Polyurethane Foam
Manufacturer RectorSeal Fire Stopping Products
SKU: DraftBlock
Draft-Block Expanding Polyurethane Foam

Draft-Block™ is a one component expanding polyurethane foam sealant that expands to three times its original dispensed volume. It is designed to reduce heating and cooling costs by filling and insulating openings.

Draft Block™ is an effective acoustical sealant and reduces sound transmission. Its dielectric formula will not transmit an electric current and adheres readily to wood, glass, metal, tile, concrete and most plastics.


  • Excellent filler which bonds and insulates
  • Fills voids, cracks, crevices and small cavities on flat or irregular surfaces
  • Reduces sound transmission
  • Totally dielectric


  • Expands 3X
  • Tack-free in approximately 45 minutes
  • No urea-formaldehyde


Draft-Block™ | Product Information

Product Code Size Quantity Per Case
12 oz Aerosol

Additional Product Literature
Data Sheet


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