* Adhesive also known as glue,cement,mucilage

or paste is any non-metallic substance applied to 

one or both surfaces of two separate items that

binds them together and resists their separation.

* Adhesives are designed for specific applications.

* They can be used for other purposes such as sealing 

agents,in order to eliminate the effect of self loosening

caused by dynamic loads,sealing of areas to prevent

oxidation and corrosion,waterproofing,etc.