DINITROL 77 B is a corrosion preventive fluid, designed for long-term protection against corrosion and, due to its residual hard film affords some protection against mechanical wear. DINITROL 77 B contains environmentally acceptable low aromatic solvents, which once evaporated leaves a thick, brown waxy film. DINITROL 77B is primarily designed for cavity protection but may also be used for storage, transport and underbody protection.