sealant
Americannoun
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a substance used for sealing, 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
Other Word Forms
Noun Inflected Forms
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.
David Hearn was indicted for allegedly peeling off a portion of newly installed sealant on one of Trump’s pet projects.
From The Wall Street Journal • Jul. 4, 2026
The pool was clouded with algae within days of being refilled and large pieces of the new sealant could be seen peeling from the bottom.
From BBC • Jul. 2, 2026
He said, “Leaks to radiators can be very difficult to repair and hopefully this chemical sealant will do the trick.”
From MarketWatch • Feb. 7, 2026
One result of this research is CEVAP's patented fibrin sealant, described as a "biological glue."
From Science Daily • Nov. 18, 2025
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.
