Flex Seal On Windows Repack Jun 2026

The short answer is: Yes, but only in very specific scenarios. Here is everything you need to know before you spray.

The original spray is best for hard-to-reach exterior corners or sealing the junction between the window frame and the house's flashing. It is difficult to control, so it should not be used directly on the glass or near moving parts of the window. 4. Flex Tape flex seal on windows