3M Fire Barrier Watertight Spray acts as a barrier to water leakage and airborne sound transmission, while helping control the spread of fire, heat and smoke. The product is a moisture-curing hybrid siliconized polymer that forms a tough coating, making it an excellent choice for the treatment of large areas that require both fire protection and a watertight seal. Building contractors can use the company’s spray to seal off perimeter joints and floor-to-floor or floor-to-wall construction joints. The spray provides uniform results under varying conditions and is freeze/thaw-resistant. Its elastic material maintains performance across a broad range of applications with up to ±10 percent movement capabilities. For more information, visit 3M.com/firestop.