Polyurethane liquid Waterproofing membranes are major waterproofing applications can be used indoor and outdoor like terraces, roofs , wet areas and retaining walls. Polyurethane liquid membranes can be applied by roller or airlessspray. Polyurethane liquid Waterproofing systems are the highest technology and durable and elastic coating for buildings. They have excellent protective functions for humidity and underground water flowing in basements of buildings.