SPIDER P SA is a top-quality prefabricated SELF-ADHESIVE bitumen membrane produced using ADESO technology, the innovative ELASTOMERIC-PLASTOMERIC (Plastomer-Polymer Bitumen) compound laminating system developed by Polyglass SpA. In the ADESO membranes, the exclusive SEALLap polyurethane self-adhesive system further improves the bond along the side laps of overlapping membranes as they are applied. In the mineral versions, the ADESO membranes feature the FASTLap system, the head selvedge free from slate chippings, which allows a faster and easier application and a better sealing of the overlaps. SPIDER P SA is a membrane produced to the standards set by NAT technology, the production system for the control of polymer matrix ageing in bitumen membranes. SPIDER P SA has a polyester non-woven carrier, stabilized with glass strands parallel to the machine direction. The carrier gives good puncture resistance, dimensional stability, and tensile strength in all directions.