The viscosity and reactivity of adhesives are closely related to temperature. The viscosity of glue is measured by Brinell viscometer, and the unit is "cps centipoise". The viscosity reading of glue is generally between 300 and 30000 cps. In water-soluble adhesives, the solid content does not determine the viscosity of the glue, but the plasticizer, tackifier, etc. in the formula of the glue, which affects the viscosity value of the glue.

Glue is an intermediate connecting two kinds of materials, most of which are water agents. It belongs to fine chemical industry and has a wide range of types. It is mainly classified by adhesive, physical form, hardening method and material of the adhesive.