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
Recent Examples on the Web
The Sheen family had amassed wealth through a sealant invented for cemetery vaults and through his relatives, Joe Sr. was able to live an affluent lifestyle.
—
Alex Gurley, Peoplemag, 27 June 2024
In many states, for example, licensing regulations prevent nurse practitioners and dental hygienists from performing new preventive health procedures—such as applying protective varnishes and sealants to teeth—by restricting the carrying out of these procedures to doctors and dentists.
—James Bessen, Foreign Affairs, 15 Dec. 2014
How to Remove Stains from Granite Countertops Although your granite may be properly sealed, a sealant is designed to repel stains rather than completely prevent them.
—Caitlin Sole, Better Homes & Gardens, 10 July 2024
The six-foot-by-10-foot glass panels are fastened to the superstructure using a special glue and sealant, a novel process that needed to be approved by Lloyd’s.
—Julia Zaltzman, Robb Report, 4 July 2024
See all Example Sentences for sealant 
Alex Gurley, Peoplemag, 27 June 2024
In many states, for example, licensing regulations prevent nurse practitioners and dental hygienists from performing new preventive health procedures—such as applying protective varnishes and sealants to teeth—by restricting the carrying out of these procedures to doctors and dentists.
—James Bessen, Foreign Affairs, 15 Dec. 2014
How to Remove Stains from Granite Countertops Although your granite may be properly sealed, a sealant is designed to repel stains rather than completely prevent them.
—Caitlin Sole, Better Homes & Gardens, 10 July 2024
The six-foot-by-10-foot glass panels are fastened to the superstructure using a special glue and sealant, a novel process that needed to be approved by Lloyd’s.
—Julia Zaltzman, Robb Report, 4 July 2024
See all Example Sentences for sealant
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'sealant.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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“Sealant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sealant. Accessed 27 Jul. 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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