What is the difference between adhesion and cohesion?
Adhesion is the molecular attraction exerted between the surfaces of bodies in contact whereas cohesion is the molecular attraction by which the particles of a body are united throughout the mass. Generally, adhesives use adhesion and sealants use cohesion. Another way to think about this is that adhesion means how well a substance sticks to another substance and cohesion is how well a substance sticks to itself.
