1
: a sealing agent
a radiator sealant
2
: 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
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Advertisement Elsewhere on Wall Street, H.B. Fuller sank 7.5% after the seller of adhesives, sealants and other specialty chemical products said it’s recently seen a slowdown in sales to a number of its customer categories.
—
Stan Choe, Los Angeles Times, 2 Jan. 2025
Outdoor brick is up for plenty of environmental elements—water among them—but indoor brick is another story, once again, thanks to its protective sealant that can be worn away or damaged with the introduction of water.
—Patricia Shannon, Southern Living, 22 Oct. 2024
But mass timber is sturdy and readily repaired, especially when coated with anti-graffiti sealants.
—Justin Davidson, Curbed, 8 Jan. 2025
This serum finishes hair with a super-smoothing shine that seals ragged ends, thanks to its silicones, which cosmetic chemist Randy Schueller has told Allure to act like a sealant and tamp down frizz.
—Marci Robin, Allure, 21 Dec. 2024
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Stan Choe, Los Angeles Times, 2 Jan. 2025
Outdoor brick is up for plenty of environmental elements—water among them—but indoor brick is another story, once again, thanks to its protective sealant that can be worn away or damaged with the introduction of water.
—Patricia Shannon, Southern Living, 22 Oct. 2024
But mass timber is sturdy and readily repaired, especially when coated with anti-graffiti sealants.
—Justin Davidson, Curbed, 8 Jan. 2025
This serum finishes hair with a super-smoothing shine that seals ragged ends, thanks to its silicones, which cosmetic chemist Randy Schueller has told Allure to act like a sealant and tamp down frizz.
—Marci Robin, Allure, 21 Dec. 2024
See all Example Sentences for sealant
Dictionary Entries Near sealant
Cite this Entry
“Sealant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sealant. Accessed 24 Jan. 2025.
Copy CitationMedical 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
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