Waterborne Epoxy Resin (WBER) are the polymers which possess hydrophilic nature and are eco-friendly in nature. On curing, these polymers form a robust 3D network structure having high strength, strong adhesion along with great thermal stability. WBER can be prepared using three different techniques: mechanical, emulsification, and chemical modification. WBER provides a wide range of applications in pulp and paper industry. Water borne epoxy resin is an excellent material for coating and hence it provides number of applications in various areas including pulp and paper sector. In paper industry these epoxy resins are utilized for machinery coating for corrosion prevention and also in paper coating which results in enhancement of its physical and barrier properties which helps in providing sustainable packaging material. This chapter is focused on structural systematization of epoxy resins, overview of water borne epoxy resins, preparation, classification, characterization, advantages and applications of water borne epoxy resins. This chapter also depicts the benefits, challenges and future scope of water borne epoxy resins. In this chapter, the work of various researchers on epoxy resin and water borne epoxy resin in pulp and paper industry has also been summarised.