Literally, a Sealant is a viscous material which becomes solid after application.
The main uses of a sealant are either to form a protection barrier, to seal
two substrates together, or to fill gaps or holes. Basically this
is a material which has the adhesive and cohesive properties to form a seal.
Sealants form a "bridge" between the surfaces and offer several advantages like versatility, chemical
resistance, and weather resistance. Main market applications are building
and construction, transportation and Do-It-Yourself.
Sealants are classified according to their physical properties: Elastic sealants
have high recovery (over 70%), plastic sealants display only slight or no
recovery at all (up to 20%) and Elasto-plastic and plasto-elastic sealants
with properties in between.