In service conditions, glue and sealing glue should be used in a certain environment, and the working conditions have an important impact on the bonding performance. In the use conditions, there are stress conditions, ambient temperature and humidity, chemical media conditions, outdoor conditions, etc. When the adhesive is subject to peeling force and uneven pulling force, the adhesive with good toughness can be selected, such as rubber glue, polyurethane glue, etc; When subjected to uniform pulling force and shear force, adhesives with higher hardness and strength can be selected, such as epoxy adhesive and acrylate adhesive.

Glue is a substance that can bond two objects. Glue does not exist independently. It must be applied between two objects to play a bonding role. The chemical composition in the glue, in an aqueous environment. The polymer in the glue (vinyl acetate in the white glue is a kind of petroleum derivative) is a round particle, and the radius of the particle is generally 0.5~5 μ M.