sealant

noun

seal·​ant ˈsē-lənt 

1

: a sealing agent

a radiator sealant

2

: a plastic material applied to parts of teeth with imperfections (such as pits and fissures) to prevent dental decay

Examples of sealant in a Sentence

Recent Examples on the Web

Fed chairman’s words suggest a rate hike Pirro’s case against Hearn, filed in early July, accused the 67-year-old of damaging the pool in front of the Lincoln Memorial by ripping up part of its sealant with his hands. — Kevin Breuninger, CNBC, 3 Aug. 2026

Loose parts of the sealant could be seen floating in the murky water. — Antonio Pequeño Iv, Forbes.com, 1 Aug. 2026

Prosecutors said the peeling that was referenced in Hearn's case was caused by sealant that was sprayed around those joints. — Jacob Rosen, CBS News, 31 July 2026

Some were assigned foot patrols near the Reflecting Pool and in quick succession, court records show, arrested several other visitors for allegedly reaching into the pool and pulling up pieces of sealant. — Matt Viser, The Atlantic, 20 July 2026

Word History

First Known Use

1944, in the meaning defined at sense 1

Medical Definition

sealant

noun

seal·​ant ˈsē-lənt 

: a plastic material that is applied to parts of teeth (as the occlusal surfaces of molars and premolars) with imperfections (as pits and fissures) usually to prevent dental decay