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High quality expanding urethane foam designed to fill large areas quickly and permanently. Uses include filling holes, cracks, or gaps that require a complete airtight and waterproof seal but are too large to be filled with ordinary caulk. The foam expands approximately 3 times its original volume, is tack free in approximately 45 minutes, and fully cured in 12 hours. Dispensing apparatus included with each can. UL classified.


  • Forms a permanent weather-tight seal to minimize drafts and insect infestation
  • Bonds to wood, drywall, metal, masonry, glass, and most plastics, Interior/exterior use
  • Tack free in six minutes-trims in 30 minutes,
  • Foam elasticity allows for movement/shifting within a structure from winter to summer
  • Paintable, stainable and sandable, cures rigid, UL classified.

Great Stuff™ Big Gap Filler

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