Crossword Genius

Watertight coating (7)

Ross

I believe the answer is:

sealant

(Other definitions for sealant that I've seen before include "closer?" , "Material used for an airtight or watertight join" , "Filler used to close a gap" , "Mastic maybe" , "Substance for closing something tightly" .)

I've seen this clue in The Star Tribune.
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.