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
High-risk individuals are recommended fluoride tablets, varnishes, gels or sealants depending on their age.
—
Soph Warnes, CNN Money, 15 May 2025
Three wash levels are available with options for waxes, sealants, wheel cleaning, tire dressing, and high-pressure rinses that are provided in state-of-the-art wash tunnels.
—Julie Gallant, San Diego Union-Tribune, 8 May 2025
Your generous donations will go directly towards the materials needed for the restoration process, including high-quality paints, sealants, and other essential supplies.
—Natasha Dye, People.com, 29 Apr. 2025
Painter’s tape lined the window frames, a makeshift sealant.
—Anna Wiener, The New Yorker, 24 Mar. 2025
See All Example Sentences for sealant
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Soph Warnes, CNN Money, 15 May 2025
Three wash levels are available with options for waxes, sealants, wheel cleaning, tire dressing, and high-pressure rinses that are provided in state-of-the-art wash tunnels.
—Julie Gallant, San Diego Union-Tribune, 8 May 2025
Your generous donations will go directly towards the materials needed for the restoration process, including high-quality paints, sealants, and other essential supplies.
—Natasha Dye, People.com, 29 Apr. 2025
Painter’s tape lined the window frames, a makeshift sealant.
—Anna Wiener, The New Yorker, 24 Mar. 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 24 May. 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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