Professional assembly lube with film forming lubricant designed to protect moving components and wear surfaces during engine assembly and initial break in. Formulated with 2X zinc and extreme pressure additives. Provides excellent protection during long storage periods. Great for assembling seals, engine bearings, gears, piston and rod pin bores. Four oz. of the assembly lube is enough for several engine builds. With a hint of cinnamon it even smells good! Really great stuff! ​