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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The problem is the sugar must be heated to 150 degrees to work quickly as a sealant, Rorabaugh said.
—
Jamie L. Lareau, Detroit Free Press, 30 Oct. 2024
The beeswax will create a water-resistant coating, acting as a sealant from the outside elements.
—Claire Hoppe Norgaard, Better Homes & Gardens, 9 Oct. 2024
Step right this way for an in-depth explainer on how to clean and care for it, but here’s the gist: At least once a month, pull out a clean microfiber cloth, a food-grade mineral oil, and a food-safe board sealant that combines oil with a protective beeswax.
—Alaina Chou, Bon Appétit, 17 Sep. 2024
Their protective patina, sealants, and coatings can be damaged due to the high-pressure cleaning process.
—Patricia Shannon, Southern Living, 21 Sep. 2024
See all Example Sentences for sealant 
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Jamie L. Lareau, Detroit Free Press, 30 Oct. 2024
The beeswax will create a water-resistant coating, acting as a sealant from the outside elements.
—Claire Hoppe Norgaard, Better Homes & Gardens, 9 Oct. 2024
Step right this way for an in-depth explainer on how to clean and care for it, but here’s the gist: At least once a month, pull out a clean microfiber cloth, a food-grade mineral oil, and a food-safe board sealant that combines oil with a protective beeswax.
—Alaina Chou, Bon Appétit, 17 Sep. 2024
Their protective patina, sealants, and coatings can be damaged due to the high-pressure cleaning process.
—Patricia Shannon, Southern Living, 21 Sep. 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 15 Nov. 2024.
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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