sealer

• 指用于在 porous 表面形成坚硬保护涂层或起到密封、封闭作用的物质或材料，也指负责在文件上盖印以证明其真实性的官员或人员。

A noun referring to a substance or material used to form a hard, protective coating on a porous surface, or an official who affixes a seal to a document.

1. Sealing materialB2formal

   A substance applied to a surface to make it non-porous, often used as a primer or protective coating.

   密封剂

   • Apply a coat of sealer to the wood before painting.
   • The concrete floor needs a good sealer to prevent stains.
   • Use a masonry sealer to protect the brick wall from moisture.

   同义词coatingfinishlacquerprimersealantundercoatvarnish

2. Official who affixes a sealC1formal

   A person authorized to stamp or affix an official seal onto documents to certify their authenticity.

   盖章人

   • The court sealer verified the documents before they were filed.
   • The sealer stamped the contract with the official seal.
   • A notary public often acts as a sealer for legal papers.

   同义词notarynotary public