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
Apply sealant to the fitting, then tighten it onto your barrel.
—
Viveka Neveln, Better Homes & Gardens, 16 May 2024
And despite a 2019 ban keeping it out of consumer paint-stripping products, the chemical is still widely available in other items — from aerosol degreasers to sealants.
—Jamie Smith Hopkins, USA TODAY, 14 May 2024
See all Example Sentences for sealant 
Viveka Neveln, Better Homes & Gardens, 16 May 2024
And despite a 2019 ban keeping it out of consumer paint-stripping products, the chemical is still widely available in other items — from aerosol degreasers to sealants.
—Jamie Smith Hopkins, USA TODAY, 14 May 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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Cite this Entry
“Sealant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sealant. Accessed 29 May. 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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