Leaving a broken window seal unaddressed is an expensive mistake. Beyond the ugly "foggy" look, you are losing R-value (insulation). A window with a broken seal is essentially just a thin sheet of glass, allowing your air conditioning to leak out all summer and your heat to escape all winter. Furthermore, trapped moisture can eventually lead to mold growth within the window sash. Conclusion
Before you spend a dime, check the paperwork. Most IGUs come with a 10 to 20-year warranty on seal failure. broken window seal exclusive
When this barrier cracks or peels, the gas escapes and the window loses its specialized insulating property. Leaving a broken window seal unaddressed is an