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
Paints, sealants, insulations, metals, and more can release many kinds of volatile organic compounds, gaseous pollutants and particulate matter.
—
Allison Parshall, Scientific American, 13 Jan. 2025
Apply waterproof sealant over your rubber washer and insert the spigot into the hole on the outside wall of your DIY rain barrel.
—Viveka Neveln, Better Homes & Gardens, 16 May 2024
Wound paint or sealant is not necessary and is now considered harmful.
—Carl R. Gold, Baltimore Sun, 13 Jan. 2025
Look out for gaps where caulking or sealant has pulled away from the window frame.
—Rabekah Henderson, Southern Living, 11 Jan. 2025
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Allison Parshall, Scientific American, 13 Jan. 2025
Apply waterproof sealant over your rubber washer and insert the spigot into the hole on the outside wall of your DIY rain barrel.
—Viveka Neveln, Better Homes & Gardens, 16 May 2024
Wound paint or sealant is not necessary and is now considered harmful.
—Carl R. Gold, Baltimore Sun, 13 Jan. 2025
Look out for gaps where caulking or sealant has pulled away from the window frame.
—Rabekah Henderson, Southern Living, 11 Jan. 2025
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 20 Feb. 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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