If a storm is bearing down and you have a cracked pane or a sudden gap in the sealant, Flex Seal is a fantastic "band-aid." It will stop water from pouring in instantly, buying you time until a professional glazier can fix the glass properly.
So, when you notice a drafty window or a small leak around the frame during a rainstorm, it’s tempting to reach for that aerosol can. But
Sealing the glass panes, the sliding tracks, weatherstripping, or window AC units. flex seal on windows
We’ve all seen the infomercials. A screen door on a boat, a leaky bucket, or a cracked gutter—and in seconds, that trusty blue (or black, or clear) can of Flex Seal saves the day.
When in doubt, grab a caulk gun. Your windows—and your home’s resale value—will thank you. Have you tried Flex Seal on a window? Let us know in the comments below (or warn us about your mistakes)! If a storm is bearing down and you
Unless you buy the clear version (which still dries with a slight haze), Flex seal leaves a thick, bumpy, textured finish. It looks like truck bed liner. It will destroy the aesthetic of your historic wood windows or modern vinyl frames.
If the wood trim around your window is old and porous, and you simply want to stop humidity from rotting the wood, a coat of Flex Seal (specifically the brush-on kind) can work as a waterproof barrier. However, standard exterior paint is usually a better, cheaper, and more attractive option. The Bad: Where Flex Seal Will Ruin Your Window Before you pull the trigger, understand the risks. Using Flex Seal on the wrong part of the window can lead to expensive repairs. We’ve all seen the infomercials
Flex Seal is sticky and rubbery. If you spray it on the window tracks, the sill, or the weatherstripping that allows the window to slide up and down, your window will glue shut. You will not be able to open it for ventilation or emergency egress.