WS-8072 Class B is a non-chromate corrosion inhibitive, light weight, fast curing polysulfide sealant. Two-part manganese cured polysulfide system with eco-friendly profile provides an effective barrier against the common causes of corrosion on aluminum and between dissimilar metals. AC-8072 B retains excellent performance characteristics at temperature excursions up to 360°F. Typical applications include sealing of fay surfaces of mating parts of aircraft structure to prevent corrosion and channeling leakage. WS-8072 Class B has outstanding retention of physical properties when exposed to aviation fuel and oils. It is a thixotropic paste with non-sag characteristics an able to be applied by an extrusion gun or with a spatula.