OptiClear S is a nonflammable, odorless degreaser that removes light oil from optics and electronics components. OptiClear S is nonconductive and leaves no residue. OptiClear S can also be used to remove wax and pitch; although the necessary soaking time is longer than that required for the original OptiClear. OptiClear S has a higher flash point and evaporates more slowly than OptiClear E.