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
Using harsh cleaners and abrasive materials, as well as leaving excess liquid on the countertop surface can cause a number of issues such as wearing down sealants, staining, discoloration, and dull spots.
—
Maria Sabella, Better Homes & Gardens, 6 Mar. 2025
Do not paint the wound with a pruning sealant; that can trap moisture in the wound and lead to rot.
—Beth Botts, Chicago Tribune, 22 Feb. 2025
For a discreet look, Garvey recommends using a beige high-performance silicone sealant on warm-toned tile.
—Maria Sabella, Better Homes & Gardens, 22 Feb. 2025
The river’s mud, which lacks oxygen, is a sealant that helps preserve remains.
—Alexander Nazaryan, New York Times, 21 Feb. 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.
Maria Sabella, Better Homes & Gardens, 6 Mar. 2025
Do not paint the wound with a pruning sealant; that can trap moisture in the wound and lead to rot.
—Beth Botts, Chicago Tribune, 22 Feb. 2025
For a discreet look, Garvey recommends using a beige high-performance silicone sealant on warm-toned tile.
—Maria Sabella, Better Homes & Gardens, 22 Feb. 2025
The river’s mud, which lacks oxygen, is a sealant that helps preserve remains.
—Alexander Nazaryan, New York Times, 21 Feb. 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 13 Mar. 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