Adhesive & Sealants

Adhesive may be used interchangeably with glue, cement, mucilage, or paste, and is any substance applied to one surface, or both surfaces, of two separate items that binds them together and resists their separation.
Sealant is a substance used to block the passage of fluids or air through the surface or joints or openings in materials, a type of mechanical seal. ... Sealants are not adhesives but some have adhesive qualities and are called adhesive-sealants.