sealer

中文： 封口机、密封剂、封闭底漆

1. A tool used to seal something.
2. A person who is employed to seal things.
3. An officer responsible for sealing writs or instruments, stamping weights and measures, etc.
4. A coating designed to prevent excessive absorption of finish coats into porous surfaces; a coating designed to prevent bleeding.
5. A goal, shot, point, etc., scored close to fulltime so that it becomes impossible for the losing side to score enough to win. (colloquial)

复数 sealers