Crossword Genius

Caulks, e.g.

Ross

I believe the answer is:

reseals

(Another definition for reseals that I've seen is " Closes up again securely".)

I've seen this clue in The New York Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.