The combination of epoxy resin and epoxy hardener is the most basic form epoxy resin and its curing hardener. Each epoxy resin has a certain hardening agent. The purpose of the hardener is to initiate and perform the curing reaction. Depending on the type of epoxy resin and its hardener, the quality of the final product can differ greatly. For instance, with the right epoxy resins, amine based hardeners provide quick curing, high mechanical strength, and make quick repair or assembly possible, thus greatly aiding in efficiency. Moreover, some grades of epoxy resins are paired with anhydride based hardeners to serve well in areas with high temperatures due to excelente heat resistance. This combination is crucial in the mformulation of epoxy based products.