A sealant is a viscous material that changes state to become solid, once applied, and is used to prevent the penetration of air, gas, noise, dust, fire, smoke or liquid from one location through a barrier into another. Typically, sealants are used to close small openings that are difficult to shut with other materials, such as concrete, drywall, etc. Desirable properties of sealants include insolubility, corrosion resistance, and adhesion. Uses of sealants vary widely and sealants are used in many industries, for example, construction automotive and aerospace industries.

Silicone is an example of a sealant.

Types of sealants

• Acryl sealants
• Polysulfide sealants
• Polyurethane sealants
• Silicone sealants
• WTK sealants
• Firestop

See also

• Caulking
• Coating
• Dental sealant
• Seam sealant
• Stone sealer
• Varnish
• Waterproofing