QUESTOL® is a liquid applied roof waterproofing membrane based on a resin of polyurea, manufactured by the company PLASFI, S.A. Consists of a pure polyurea resins, bi-component, elastomeric without internal protection layer; which once polymerised conforms a jointless elastic lining, in form of a layer completely bonded to the support (concrete, mortar, ceramic, wood, metal, polystyrene extrude (XPS) and polyurethane foam (PU)), and with a final UV protective coat. The minimum thickness of the system applied is 1.7 mm.