How To Reseal A Window Fixed

This is the hardest scenario. If you have condensation between the two panes of glass, The inert gas (argon/krypton) has escaped, and the desiccant inside the spacer is saturated.

This is the caulk where the window frame meets your siding, brick, or drywall. Failure signs include: how to reseal a window fixed

| | Result | Fixed Solution | | --- | --- | --- | | Used latex caulk outside | Cracked in 6 months | Use polyurethane or silicone | | Did not remove old sealant | New caulk peeled off | Scrape to 100% bare surface | | Sealed over wet wood | Blistering and mold | Dry with heat gun + apply primer | | Filled a deep gap entirely | Shrinkage cracks | Use backer rod (1/3 depth rule) | | Smoothed silicone with dry finger | Poor adhesion | Use mineral spirits or soapy water | This is the hardest scenario

This is where most DIYers fail. You cannot seal over old, cracked caulk. Failure signs include: | | Result | Fixed