An adhesive is a compound that adheres or bonds two items together. Adhesive can come from either natural or synthetic sources. Some modern adhesives are extremely strong, and are becoming extremely important in modern construction and industry.

The first adhesives were natural gums and other is plant resins or saps. Most early adhesives were animal glues made by rendering animal products such as the buffalo hooves. In medieval Europe egg whites were also used as glue to decorate parchments with gold leaves. As life and the modern world evolved, several other patented materials, such as bones, starch, fish, and casein, were introduced and was come to know as alternative materials from glue manufacture. Modern-time glues have improved beyond recognition. Such improvements are noticeable in its flexibility, toughness, curing rate, temperature, and chemical resistance. This glue is very useful for furnishing, and also while renovating the whole house.