Impervious Waterproofing provide polyurethane liquid membrane systems, that are proven in the harshest of environments. With roots in the industry for over 35 years, Impervious has been an innovator of polyurethane technology throughout the world. We offer a full range of waterproofing products for new and existing construction projects. Such as roofs, balconies, car parks, tanks and more. Our range includes polyurethane membranes, sealants, adhesives and coatings.