Tremco Spectrem® 1 is a high-performance, single-component, moisture-curing silicone sealant designed for demanding construction and façade applications. Engineered with an ultra-low modulus formulation, it provides exceptional flexibility and adhesion to difficult-to-bond substrates while maintaining long-term weather resistance and durability.

Ideal for expansion joints, curtain walls, precast panels, window perimeters, and air barrier transitions, Spectrem 1 accommodates significant joint movement while helping protect building envelopes from moisture intrusion, UV exposure, ozone, and temperature extremes. Its ready-to-use formula requires no mixing, making application fast, reliable, and consistent across commercial, industrial, and residential projects.

With excellent adhesion to a wide range of materials and proven performance in dynamic joint conditions, Spectrem 1 delivers dependable sealing performance where flexibility, durability, and weather protection are critical.