Sealant for assemblies with sticky paste form of high adherence with non-vulcanized butyl rubber base.It avoids corrosion between the materials where it is glued, seals assembly joints between aluminum moldings of aluminum frames in workshop (E.E.), seals corners and intersections of aluminum in prefabricated windows, seals moldings or sardinels, seals and glues overlaps of sheets and linings, among others.