Many projects require some type of sealant to either join one surface to another, or protect the area to which it is applied. In some cases, it is best if the sealant stays flexible even after it dries. Mastic sealant typically is good for this type of project, as it can bend and flex while maintaining a durable bond for years.

sealant adheres to nearly any material. The most common types that it works particularly well with include wood, glass, aluminum, concrete, marble, steel, and duct board. It often is used in construction projects, such as connecting windows to structures. It also can be used in projects at home, including sealing the area around bathtubs and filling in cracks in various types of masonry. Mastic sealant also often is applied to roofing, brick structures, and even cars and boats to keep them dust-free.