Sealant

Sealants :- are used to block the passage of fluids through the surface or joints or openings in materials, a type of mechanical seal in other words , they seal top structures to the substrate, and are particularly effective in waterproofing processes by keeping moisture out.

When sealants are used between substrates having different thermal coefficients of expansion or differing elongation under stress, they need to have adequate flexibility and elongation. Sealants generally contain inert filler material and are usually formulated with an elastomer to give the required flexibility and elongation. They usually have a paste consistency to allow filling of gaps between substrates. Low shrinkage after application is often required. Many adhesive technologies can be formulated into sealants.