Seals Air, Fire, Dirt, Water, Dampens Vibration Get In Touch 01440 766 975   [email protected] Saint-Gobain Norseal FS1000 Series is a high-performance intumescent Foam Tape  designed with a unique combination of sealing properties. This sealing foam tape is expandable and fire resistant, blocking smoke, air and water. In its natural state, FS1000 is soft, conformable, and easy to attach to complex surfaces.