Self-adhesive bituminous membrane on the lower face for applications without the use of flame, with waterproofing compound classified as BPE (Bitumen Polymer Elastomer) according to UNI 8818 standard, made of distilled bitumen modified with thermoplastic elastomers (SBS, SIS, and special resins), which make it highly adhesive, self-sealing, and highly elastic. The internal reinforcement consists of a nonwoven polyester geotextile stabilized with glass fibers.