Impervious Waterproofing - Impervious Systems with Impeccable Performance. Impervious Waterproofing are an ambitious, exciting company that 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 PU technology throughout the world. We offer a full range of waterproofing products for new and existing construction projects. These systems can be used on roofs, balconies, car parks, tanks and more. Our range includes polyurethane membranes, sealants, adhesives and coatings. Technical support and advice are at the forefront of what we offer at Impervious. Learn more about Impervious Waterproofing at www.impervious-waterproofing.co.uk and follow us on Facebook (@imperviouswaterproofinguk), Instagram (@imperviouswaterproofing) and Twitter (@Impervious_UK).