Need sealant for a metal building full of joints, angles, and corners? Sika EMSEAL AST All-Purpose Foam Sealant Tape seals off roofs, windows, and other features so moisture, dust, dirt, and other debris are kept out. The self-adhesive, versatile tape can expand to seal off window and door jambs, gables, hips, and similar features. Or, use it as a gasket in high-compression applications like skylights, utility curbs, lap seams, and base angles. It will conform to any contours and fill gaps to create a tight seal. Apply immediately upon removing from packing, as tape will begin to slowly expand once exposed to environment.