Epoxy resin adhesives, also called epoxy adhesives, have two components: Resin and hardener. Epoxy resins are polymer building blocks with so-called epoxy groups at their ends. Reaction products of bisphenol-A and epichlorohydrin are mostly used here, which form a stable thermoset after mixing with the hardener (contains amino or mercapto groups). The curing reaction is suitable both at room temperature and at higher temperatures. If the latter is the case, higher bond strengths are usually generated.