Elasto-plastomeric prefabricated waterproofing membrane whose compound is composed of distilled bitumen, plastomers, elastomers & polyolefin’s (APAO) obtained from metallocene catalysis polymerization, with molecular weight and selected tacticity. The waterproofing compound has a special inorganic and non toxic additive which confer to the product a flame retardant action. The mineral versions are self-protected on the upper face with mineral slates which reduce superficial heat absorption improving the durability of the membrane. The self-protected versions have a side selvedge of 10 cm and upon request a head selvedge of 15 cm, to improve adhesion between the sheets.