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• n  a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)

• You can't physically remove all the stains from floorboards, so they clean it as best they can and paint a sealant on the top.
• In 1987, California passed a law requiring CCA-treated structures to be coated with paint or sealant every two years.
• Physicist Harris Goldberg wants to revolutionize the $1 billion tire-sealant business, but until that goal is realized, he will settle for tennis balls.

• sealer

News & Articles

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• Is your driveway making you sick? Pavement sealant linked to high cancer risk
  Studies suggest a common sealant using coal tar contains hazardous chemicals that elevate lifetime cancer risk. So some cities and states are banning its use.
  June 18, 2013 - Detroit Free Press
• Toxic driveways? Cities ban coal tar sealants
  Barbara Mahler, a hydrologist with the U.S. Geological Survey who's researched the hazards of coal tar pavement sealant, takes a sample of parking lot dust in 2007 in Lake In the Hills, a suburb of Chicago.
  June 16, 2013 - The Bay Bulletin
• Nature Center Trails Temporarily Closed For Re-Surfacing
  Sealant Still Drying
  June 11, 2013 - KTTS 94.7