KEMPEROL® Liquid Roofing, Waterproofing and Surfacing Flat Roof Refurbishment and New Build We are specialists in providing l ... iquid roofing and waterproofing systems for the long-term protection of roofs, buildings and critical structures. KEMPEROL® is the ideal roofing membrane for flat roof refurbishment, flat roof repair or replacement, and as the waterproofing for balconies and walkways, warm roofs, inverted roofs and green roof systems. The Home of Sustainable Liquid Roofing What have the Gherkin in London, the BMW car plant in Steyr and the Empire State building in New York all have in common? A countless number of building projects world-wide are protected by KEMPEROL® liquid waterproofing supplied by Kemper System - A worldwide leader in manufacturing the highest quality resin based cold liquid applied waterproofing membranes for the construction industry. read more