sealer

漢語翻譯

【計】 密封層, 密封器
【化】 表面保護層

英文解釋：

名詞 sealer:

1. a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)
   同義詞：sealant
2. an official who affixes a seal to a document