A polyurethane coating is a layer of polyurethane (a type of polymer) that is applied to a material's surface in order to protect it.It is used for waterproofing of patios, roofs and balconies; under tile wet areas, foundation and foundation walls, flowerpots, water wells, water tanks and water-transport pipes against water. A polyurethane coating can protect the base material from water leakage, corrosion, weathering, abrasion and other processes that would degrade the material over time.
