Urea, amino, EPOXY, and ELEMI are all kinds of resin. Urea is a type of organic compound that is produced in the liver and excreted in urine. Amino is an organic compound that contains nitrogen and is found in proteins. EPOXY is a thermosetting polymer that is used in adhesives and coatings. ELEMI is a yellowish-brown resin obtained from the tree Canarium luzonicum. All four of these resins are used in a variety of applications, such as adhesives, coatings, and sealants.