sealant

noun

seal·ant ˈsē-lənt

: a sealing agent

a radiator sealant

: a plastic material applied to parts of teeth with imperfections (such as pits and fissures) to prevent dental decay

Examples of sealant in a Sentence

Recent Examples on the Web

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Note that some sealants can last up to 20 years while others last 10 years only. — Helen Andriatsitohaina, The Spruce, 24 June 2026 Using flimsy or degradable sealants that allow bats to reenter. — Alora Bopray, USA Today, 24 June 2026 Apply a sealant to the sidewalk, if desired, to prevent future staining. — Karen Brewer Grossman, Southern Living, 25 June 2026 But recent photos of the pool show that the blue sealant has started to peel away, leaving chunks floating at the surface, while algae growth has turned the water green. — Lauren Zola, NBC news, 24 June 2026 See All Example Sentences for sealant

Word History

First Known Use

1944, in the meaning defined at sense 1

Time Traveler

The first known use of sealant was in 1944

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sea language

sealant

sea lark

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Style

“Sealant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sealant. Accessed 7 Jul. 2026.

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Medical Definition

sealant

noun

seal·ant ˈsē-lənt

: a plastic material that is applied to parts of teeth (as the occlusal surfaces of molars and premolars) with imperfections (as pits and fissures) usually to prevent dental decay

sealant

noun

Examples of sealant in a Sentence

Word History

Browse Nearby Words

Cite this Entry

Medical Definition

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