What Is Joint Sealer

What Does Joint Sealant Mean? This is a polymer-based gasket used in building and construction design applications to fill and protect joints between two substrates.

What are joint sealants in construction?

Joint sealers are used to close open joints to keep water and air out (both exterior and interior); for appearance and cleanability (in interior surfaces where water resistance is not an issue); and to reduce sound transmission through cracks (usually interior and internal to composite assemblies).

Which material is used for joint sealant?

There are three classes ofjoint sealant materials: preformed neoprene (used only in new construction), silicones, and “all others.” VDOT uses only silicones and hot-poured materials in repair work. No cold-poured materials are used. In new construction, only preformed neoprene or silicones are used.