sealant
Americannoun
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a substance used for sealing, seal, as sealing wax or adhesives.
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any of various liquids, paints, chemicals, or soft substances that may be applied to a surface or circulated through a system of pipes or the like, drying to form a hard, watertight coating.
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Dentistry. any of several transparent synthetic resins applied to the chewing surfaces of molars and premolars in young children and teenagers as a preventive measure against tooth decay in the occlusal pits and fissures.
noun
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any substance, such as wax, used for sealing documents, bottles, etc
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any of a number of substances used for stopping leaks, waterproofing wood, etc
Etymology
Origin of sealant
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
What’s more, he conceded that he did not have the required chemical sealant on the first visit.
From MarketWatch • Feb. 7, 2026
Its amino acid sequence differs from gyroxine, a toxin taken directly from rattlesnake venom and used in fibrin sealant production.
From Science Daily • Nov. 18, 2025
When dealing with the aftermath of a wildfire, Huml said he starts by decontaminating the attic, ripping out soot-infested insulation and using a spray-on odor sealant on porous wood.
From Los Angeles Times • Jan. 16, 2025
You must have a sealant painted on your tooth or risk bacteria creating holes in it.
From New York Times • Apr. 15, 2024
Beneath the sealant, a red light flicked on.
From "Artemis Fowl" by Eoin Colfer
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
