Waterproofing composite elastomeric self-adhesive membrane with differentiated waterproofing mass, which allow the optimal utilization of each components properties, satisfying the different requirements. The SOLAR EXTRA membranes are capable of resolving specific application and functional requirements and present numerous and important advantages, such as ease of application with consequential savings on time and the possibility to apply the material on surfaces which are not suitable to open flame. Therefore SOLAR EXTRA is insuperable in the waterproofing of wood structures, insulation panels which are heat sensitive, panel decks and refurbishment of historical roofs.