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.
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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use sealant in a sentence
Tom Burke, director of the Johns Hopkins Risk Sciences and Public Policy Institute, said the sealant included xylenes, chemical compounds often used as solvents that act on the brain and nervous system.
In addition, she said, that particular sealant was chosen because it was the product with the lowest toxicity that was still effective.
The sealant was being used to waterproof the roof and had to be spread across the entire membrane, not just applied to seams.
Meanwhile, MGS features widely in consumer goods, including aluminum alloys used in car manufacturing as well as silicones that go into cosmetics, sealants and batteries.Solar industry’s ties to China’s Xinjiang region raise specter of forced labor | Lily Kuo, Pei Lin Wu, Jeanne Whalen | June 24, 2021 | Washington Post
Desperate mountain bikers have resorted to using pancake batter as tire sealant.
He slapped down the lid and watched the sealant ooze around the seam.The Game of Rat and Dragon | Cordwainer Smith
British Dictionary definitions for sealant
any substance, such as wax, used for sealing documents, bottles, etc
any of a number of substances used for stopping leaks, waterproofing wood, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012