This foam stick is great for filling large gaps before applying sealant. The foam is very flexible and can be used to fill even small cracks if you use a shackle to hold the pad firmly in place (I used a plastic scraper to push the pad into a small crack) . I used this pad to fill a large gap around a door frame in an old house we rent because the frame seems to have shifted over time. I then filled the crack with brown wood sealant and the crack is no longer visible.