Spectrem 2 Silicone Sausage - Grey Spectrem 2 is a medium-modulus, one-part, high-performance, neutral-cure silicone sealant, ideal for a variety of perimeter caulking and glazing applications. Spectrem 2 is suitable for both caulking and glazing applications, including cap beads, toe beads, heel beads and other typical air seals. It is particularly appropriate as a weather seal and tensile bead in two-sided structural glazing systems and ideal for sealing joints within the curtain wall or window systems. Spectrem 2 may be used as a weather seal for materials such as aluminum, glass, steel, painted metal, plastic, stone, concrete and brick. Spectrem 2 exhibits primerless adhesion to many common building materials.