Sealant is a liquid form of material which typically looks, feels, and acts like a gel. Sealant keeps its elasticity and stability in both high and low temperatures. Furthermore, sealant is resistant to other chemicals, moisture and weathering.

Sealants are used to close openings that are difficult to shut with other materials, such as concrete, drywall etc. Desirable properties of sealants include insolubility, corrosion, resistance and adhesion.

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 easy flow and filling of gaps between substrates along with low shrinkage post application.

Proper sealing of windows and doors is something that should never be overlooked. Using a good quality sealant can be very beneficial in protecting a home.