sealant
Americannoun
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sealants
plural
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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.
See Examples For:
He explains that there's a lot that can go wrong when trying to marry recyclable paper packaging with a compatible sealant.
From BBC ● Jul. 27, 2026
Former canoe racer David Hearn is accused of pulling at a layer of peeling sealant used in a renovation project that President Trump had personally championed and later claimed was targeted by vandals.
From The Wall Street Journal ● Jul. 2, 2026
What’s more, he conceded that he did not have the required chemical sealant on the first visit.
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
“I’ll go get you some caulking,” he says, and hurries off to retrieve the sealant from his garage, obviously happy for an opportunity to put his Boy Scout training into action.
From "Dry" by Neal Shusterman and Jarrod Shusterman
RPM, with a market capitalization of about $14.4 billion, makes coatings, sealants and building materials, such as Plastic Wood, Rust-Oleum and Zinsser.
From The Wall Street Journal ● Jan. 16, 2026
The other applies to home upgrades that include windows, doors and sealants that can better insulate a home from high and low temperatures.
From MarketWatch ● Nov. 10, 2025
These included manufacturing defects affecting parts of fuselages, tail and rudder assemblies, as well as sealants applied as protection against the effect of lightning strikes in central fuel tanks.
From BBC ● Dec. 27, 2024
At each school visit, a team of health professionals examined children's teeth and applied either sealants or SDF followed by fluoride varnish, depending on which treatment the school was randomly assigned to receive.
From Science Daily ● Mar. 4, 2024
Ask the dentist to apply sealants to a child’s back molars around the age of 6, the Los Angeles County Department of Public Health recommends.
From Los Angeles Times ● Oct. 27, 2023
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.
