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Definition of "sealant" [sealant]

  • A substance, such as sealing wax, used to seal a surface to prevent passage of a liquid or gas. (noun)
  • A plastic resin used in dentistry to coat the chewing surfaces of the back teeth to prevent the growth of cavity-causing bacteria. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "sealant" in a sentence
  • "A re-application of non-oil-based sealant is in order after a year of service."
  • "Had my whole house done in "saltillo tile" - and sealed and protected with a shiny sealant - now, a few years later - the sealant is blistering off - and exposing the original surface - which is being stained by the mopping!! has anyone ever SANDED DOWN and refinished tile by tile? if so, how and with what products available in Guadalajara?"
  • "Researchers in Austin have found that the level of PAHs can be 25 percent higher in homes adjacent to parking lots with coal-tar sealant, which is a huge concern for those of you with children crawling around on the floor."