NordShield™ from Johns Manville
SureGrip™ is also used under shingles, slate, shakes and tiles. It prevents leaks and damage to decking and internal structures from wind-blown rain, water backup and gutter debris. This self-adhering membrane is composed of a rubberized-asphalt roofing sheet with a strong, inorganic glass mat for reinforcement. The top surface is embedded with fine inorganic granules. The back is covered with an easily removable dual-scored plastic release form. The membrane is also used as a vapor barrier for roofs, walls and floors. It can be used as a concealed flashing on roof ridges, in valleys, around chimneys and penetrations and where the base edge of a higher wall or parapet meets a roof surface.