Hyperdesmo® PB-LV is a quick-curing, one component, bitumen-extended polyurethane fluid. It produces a hydrophobic, elastic, low modulus, membrane with very strong adhesion to most types of substrates, as well as bituminous, and excellent mechanical and chemical resistance properties. It is based on pure elastomeric hydrophobic polyurethane resin and is extended with chemically polymerised virgin bitumen