It is a self-adhesive composite elastomeric waterproofing membrane as it is composed of different waterproof masses that result in an optimal utilisation of the properties of each component, thus meeting the different requirements. SOLAR EXTRA membranes are able to solve specific application and functional requirements and have numerous and important advantages, such as ease of installation with consequent saving in the application and the possibility to apply on surfaces sensitive to open flames and heat. SOLAR EXTRA is recommended for waterproofing wooden structures, heat-sensitive insulation panels , deck roofs, restoration of historical and artistic roofs. The PA version upper face is self protected with mineral slates which reduce the absorption of heat on the membrane surface; this version is equipped with a special 10 cm side selvedge that increases membrane adhesion and facilitates application. The P version upper face is self protected with a special film with a particular geometric serigraphy, specially designed to facilitate the application. SOLAR EXTRA is an innovative self-adhesive with increased adhesiveness, enhanced resistance of the adhesion to aging and the cold.