Water or any hydrocarbon solvent is commonly used as a thinning agent. Based on which types of thinning agent are used to reduce the viscosity of coating material, coatings are named either solvent-based or water-based coatings. The surface coatings industry has undergone a profound shift in recent decades, largely due to environmental concerns . Due to rising environmental and health regulations, efforts are made to decrease the VOC (Volatile Organic Compound) of coatings. Reducing the VOC of organic coating is one of the most challenging jobs nowadays in the paints industries. A 'VOC' i.e. volatile organic compound can be defined as a compound that evaporates from the coating system and takes part in photochemical reactions in the atmosphere to produce health hazards . Therefore, it is foremost important to develop the coating with no or minimum VOC. Thus use of water in coating formulation is vital requirement in today's industrial scenario. However, water-based coatings may not always contain zero solvents. Many water based coatings comprise what we called 'co-solvents'. These Co-solvents belongs to glycol or similar families and present at very low quantities. These co-solvents are added to facilitate the drying of water based coating by expelling water out from coating film. Thus, for reducing the VOC of the coating use of water is the best choice for coating formulator.