WHAT IS THE DIFFERENCE BETWEEN A SEALANT AND ADHESIVE

Sealants (caulks) are substances used to fill gaps of joints between two materials to prevent the passage of liquids, solids, or gases. While Adhesive (glues) are substances capable of forming and maintaining a bond between two surfaces.

A difference between sealants and adhesives can be found in their general uses. The sealant may be utilized in any specified capacity where the intention is to keep something in, or just the opposite - to keep something out. For instance, the product could be utilized during various construction projects, such as building, where it can be applied in various capacities to fully seal openings between surfaces that may be difficult to close in any other manner. 

When used in home construction, a sealant can be applied to keep out air drafts, soot or any other minute particulate manner, while an adhesive in such a situation would be for other applications that require bonding two materials to themselves in a more comprehensive manner. This preference for sealants and adhesives for different purposes shows the different between the two materials.

Another different between sealants and adhesives can be seen in the type of preparation that goes into the application of the two products. For instance, since the function of an adhesive requires a better adhesion to the surfaces in order for it to hold properly, some special types of preparation must be applied to the surfaces in order for them to allow the adhesive to take upon application. On the other hand, the standard required for the application of sealants is not as complicated as that for adhesives, even though some basic conditions must be met before the sealants can be applied. 

Picture from Vital Technical - Adhesives (Glues)

Picture from Vital Technical - Sealants (Caulks)

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