When you lay the caulking bead, try to push the caulking into the gap instead of dragging it onto the gap. This greatly increases the possibility that the sealant will adhere to both surfaces, as it will press the sealant into the gap without pulling it in.

If you need to run the bead for a long time and cannot finish the shot, please do not restart from where you stopped. Instead, start at the other end and meet in the middle. Once you stop without creating a sphere, it is difficult to continue to form beads. In addition, try to keep the meeting place out of sight.