Building leakage specialist work in manapparai Rvs waterproofing construction chemicals Application chemicals supplier distributor A polyurethane coating is a polyurethane layer applied to the surface of a substrate for the purpose of protecting it or adding another element — such as color. These coatings help protect substrates from various types of defects such as corrosion, weathering, abrasion, and other deteriorating processes. tiruchirappalli