Profile: Siplast, Inc. is engaged in the production of roofing and waterproofing systems. We deal with metal, roofing fasteners or sealants. Our roof system package combines SBS-modified bitumen membranes with the added benefits of lightweight insulating concrete. Our SBS-modified bitumen roof membranes have a long performance history over lightweight insulating concrete. The insulation's encapsulated design provides a stable, monolithic surface for the roof membrane system.