An adhesive or stick on is a material, usually in a liquid or
semi-liquid state, that adheres or
bonds items together. Adhesives come from either natural or synthetic sources. The types of
materials that can be bonded are vast but they are especially useful for bonding
thin materials. Adhesives cure (harden) by either evaporating a solvent or by
chemical reactions that occur between two or more constituents.
Adhesives are advantageous for joining thin or dissimilar
materials, minimizing weight, and when a vibration-damping joint is needed. A disadvantage of most adhesives is
that most do not form an instantaneous joint, unlike many other joining
processes, because the adhesive needs time to cure.
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