... and sound insulation, anti-radiation and shielding.4. Moisture barrier, waterproof, good sealing property, heat preservation, energy saving..5. Moisture ... compose of PP nonwoven fabric+PE breathable film. With the functions of air impermeability, waterproof and dampproof, it is widely used ... healthy method of temperature control and energy savings. [Anti-UV] Waterproof and Breathable Roofing Underlay