Window and Door Foam by OSI - 21.1 oz

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DuPont Window & Door Foam is a minimal expansion, low pressure polyurethane window and door foam. It is dispensed with an applicator gun and works with DuPont Tyvek weather barriers to help keep air and water out around windows, doors, pipe penetrations, and joints. This low-pressure window and door foam will not warp or deform windows and doors, and adheres to all types of building materials, including wood, concrete, and drywall. Foam is tack free in 10 minutes and fully cured in 24 hours. It is also compatible with asphalt and butyl flexible flashing.

As part of a complete system to help protect the building envelope, DuPont Window & Door Foam can help increase energy efficiency by keeping cooled and heated air in, and the outside climate out. It can also block water infiltration, to help protect against moisture-caused problems, including wood rot and mold.


  • 21.1 oz Window & Door Foam
  • Low foam pressure, low expansion. Won't bow windows.
  • Effective in a variety of applications - Window and door installation, electrical and plumbing penetrations, mudsills, jambs, header joints, and top plate penetrations.
  • Excellent insulator
  • Quick setting formula
  • Easy to use
  • Dispense using an applicator gun
  • Clean foam gun and spills immediately with OSI Foam Clean (sold separately)
  • Minimal Expansion Foam


Manufacturer Part Number1866185
Sub BrandTyvek
BaseSingle Component Polyurethane
Clean UpClean tools and uncured product residue immediately with OSI Foam Clean. Note: Cured foam is not affected by solvents and is extremely difficult to remove.
Installation Temperature40 Degrees F to 120 Degrees F
Package Quantity1
StorageStore in a cool, dry place not less than 65 Degrees F (18 Degrees C) or above 90 Degrees F (32°C) for best performance. Containers are under pressure. Do not expose to open flame or temperatures above 120°F (49°C).
V.O.C< 177 g/L
Warranty10 Year Limited
Ships to HI/AKNo