Adhesive is a non-metallic material which is able to join two substrates using adhesion mechanism which is developed between the adhesive and substrate and cohesive mechanism which is developed within the adhesive itself. Sealant is a substance used to block the passage of fluids through the surface or joints or openings in materials. The main difference between adhesives and sealants is that sealants typically have lower strength and higher elongation than do adhesives.
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