sealer

noun7

1. •
   A coating designed to prevent excessive absorption of finish coats into porous surfaces; a coating designed to prevent bleeding.
2. •
   A tool used to seal something.
3. •
   A person who hunts seals.

   • "We must club the seals," I announced, when convinced of my poor marksmanship. "I have heard the sealers talk about clubbing them." — 1904
4. •
   (informal) A goal, shot, point, etc., scored close to fulltime so that it becomes impossible for the losing side to score enough to win.
5. •
   A person who is employed to seal things.
6. •
   An officer responsible for sealing writs or instruments, stamping weights and measures, etc.
7. •
   A vessel engaged in the business of capturing seals.