sealer

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun 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)
noun an official who affixes a seal to a document

From seal + -er.

In 1883 he commanded the steam sealer SEA UNICORN, of Dundee. — The Return of Sherlock Holmes, Arthur Conan Doyle
Soon sealers and whalers of different nations began to frequent the prolific new regions. — Wealth of the World's Waste Places and Oceania, Jewett C. (Jewett Castello) Gilson
Several times before I'd shaken up sour cream in a sealer, but this was my first real butter-making. — The Prairie Wife, Arthur Stringer

sealant

Type a word, a sentence, a book title, or a link to an English article. WordNet and the Classics answer.

Try

A library of classics · a vault of words · instant etymology & meaning