LIBERTY™ Self-Adhering Roofing Systems are applied without torches, open flames, hot asphalt, or solvent-based adhesives and are suitable for many primed substrates. LIBERTY™ SBS Self-Adhering Base/Ply Sheet is a self-adhering modified bitumen roofing membrane intended to be used as either a base sheet for LIBERTY™ SBS Self-Adhering Cap Sheet or as a ply sheet in modified bitumen roofing systems, providing long-lasting protection on low-slope roofs.