Car park Roofs or Green roofs have leaking problems in winter times or rainy days. To protect car parks from leaking problems , car park roofs should be applied with liquid applied Membranes, Clever Pu Primer and Clever 400 BT are the best solution for Waterproofing of car park roofs and green roofs. After priming of the Concrete structure, Clever 400 BT is applied with other system details (Insulation foam Geotextile, folio, dilatation filter). The application can be completed in a short time and it makes differance for leaking problems.