Adhesives are substances used to bind two surfaces together, and there are many different ingredients used in the production of adhesives. Alkyd, EPOXY, and MASTIC are three common adhesive ingredients. Alkyd is a type of synthetic resin made from polyester and oil, EPOXY is a thermosetting polymer made from a combination of epoxide resin and a polyamine hardener, and MASTIC is a type of sealant made from natural or synthetic resins. All three of these ingredients are used in the production of adhesives, and they provide strong bonds between surfaces.