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flex seal around windows

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flex seal around windows

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Flex Seal Around Windows !new! May 2026

| Prohibited Area | Why It Fails | | :--- | :--- | | | The rubbery surface creates high friction; windows will stick or become permanently glued shut. | | Weep holes (bottom of frame) | Clogging weep holes traps water inside the wall cavity, leading to rot and mold. | | Vinyl or aluminum frames | Flex Seal does not bond to slick PVC or anodized aluminum; it peels within weeks. | | Between sash and frame (the seal) | Flex Seal is not a gasket; it will prevent the window from closing properly. | | Over existing silicone caulk | Nothing sticks to silicone – Flex Seal will bead up and fail. | 5. Application Procedure (If You Proceed) Assuming you have verified it is a fixed, wood, or metal window.