Meet OSI Quad Tan Foam Window and Door Foam Sealant 21.1 oz—a purpose-built polyurethane foam sealant engineered to upgrade the comfort and efficiency of homes and spaces around every window and door opening. This tan, expanding foam fills gaps, creates a tight seal, and stays permanently flexible for long-lasting performance in real-world conditions.
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Moisture resistant for dependable sealing in areas exposed to humidity or weather—without compromising flexibility or adhesion.
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Permanently flexible foam that tolerates movement around framing and settling, reducing the risk of cracks or air leaks over time.
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Indoor and outdoor use makes it a versatile option for new construction, renovations, or weatherproofing projects around windows and doors.
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Tan color blends with brown wood trim and many interior finishes, helping gaps disappear visually after application.
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21.1 oz can delivers ample material for larger openings or multiple sealant jobs, with a clean-up option using mineral spirits while the foam is still uncured.
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Coverage area: 611 (as listed) to help you estimate how much space you can seal in a single project.
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Not paintable and not rated for high-heat fire exposure, so it’s best suited for general weatherproofing, draft prevention, and gap filling around typical window and door assemblies.
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Recommended surfaces include wood, fiberboard, metals, masonry, brick, concrete, marble, cork, insulation, hangers, polystyrene, bath panels, fiberglass, FRP panels, and glass—making it compatible with a wide range of substrates found in home improvement projects.
Why choose this foam sealant over alternatives? OSI’s Quad line is designed to deliver a tight, durable seal that expands to fill irregular gaps, providing improved energy efficiency and comfort without sacrificing long-term flexibility. Because it’s moisture resistant and permanently flexible, it’s an excellent option for sealing around exterior doors, basement entries, or garage access points where drafts tend to creep in and seasonal temperature swings are common.
Ideal use cases include:
- Draft-proofing gaps around new or retrofitted windows and exterior doors
- Sealing joints between rough openings and framing in wood, masonry, or metal assemblies
- Weatherproofing around trim, sills, and jambs where movement is expected
- Sealing around non-traditional substrates like insulation panels, fiberglass, or FRP components
Practical application notes:
- Prepare surfaces and cut nozzle to the desired bead size for precise, controlled filling.
- Apply in layers if needed to achieve the right fill without overexpansion.
- For cleanup, use mineral spirits while the foam is still uncured.
With OSI Quad Tan Foam Window and Door Foam Sealant, you get a robust, flexible seal tailored for real-world window and door installations—delivering reliable moisture resistance, long-term durability, and a practical solution for a tight, energy-efficient home.
