Contamination is a pervasive problem in many areas, particularly in manufacturing, medicine and the environment. It refers to the presence of undesirable materials or contaminants in a particular area, product or material. Contamination can also occur in adhesive technology if the surface has not been properly pretreated or has been treated with the wrong product or contaminated. This contamination can cause damage, malfunction or other negative effects. It is important to avoid or eliminate contamination to ensure the quality and safety of adhesives and adhesive bonds.