Watch This Industrial Epoxy PERMANENTLY Harden In Seconds! Industrial epoxy is a class of thermosetting polymers known for their exceptional mechanical strength, chemical resistance, and adhesive properties. At the molecular level, epoxy resins are typically formed through the reaction of epichlorohydrin with bisphenol-A or other polyols, creating a reactive compound with epoxide groups. When mixed with a hardener, often a polyamine or anhydride, these groups undergo a cross-linking reaction, fo