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
Use wax or sealant regularly and store your car under cover or in a garage to extend the time between cleanings.
—
Brandee Gruener, Southern Living, 7 July 2025
In addition, only 37% of Florida third graders had dental sealants.
—Olga Ensz, The Conversation, 30 June 2025
Children ages 6-11 without sealants are nearly three times as likely to develop dental caries.5
Who Is Most at Risk?
—Mark Gurarie, Health, 16 Feb. 2025
Loose internal components were taken out and the device was coated with a clear sealant.
—George Petras, USA Today, 15 Apr. 2025
See All Example Sentences for sealant
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.
Brandee Gruener, Southern Living, 7 July 2025
In addition, only 37% of Florida third graders had dental sealants.
—Olga Ensz, The Conversation, 30 June 2025
Children ages 6-11 without sealants are nearly three times as likely to develop dental caries.5
Who Is Most at Risk?
—Mark Gurarie, Health, 16 Feb. 2025
Loose internal components were taken out and the device was coated with a clear sealant.
—George Petras, USA Today, 15 Apr. 2025
See All Example Sentences for sealant
Cite this Entry
“Sealant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sealant. Accessed 21 Jul. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share