Sealant

//ˈsiːlənt// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Any material used to seal a surface so as to prevent passage of a fluid. countable, uncountable
  2. 2
    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) wordnet
  3. 3
    A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected. countable, uncountable

Synonyms

All synonyms
sealer

Example

More examples

"Wood left outdoors should be dried off and properly finished with sealant before the rot sets in."

Etymology

From seal + -ant.

Related phrases

dental sealantfissure sealantpit and fissure sealantsealant backing

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.