Meaning of sealant

seal•ant

Pronunciation: (sē'lunt), [key]
— n.
  1. a substance used for sealing, as sealing wax or adhesives.
  2. 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.
  3. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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