Hangsterfer’s S-425 is engineered to provide maximum lubricity while leaving minimum residue. Far superior results can be obtained utilizing S-425 over conventional chlorine free and most chlorinated synthetic, semi-synthetic, and soluble oil technologies. In addition, the polar additives have been synthesized to perform at optimum polar intensity. S-425 is non-hazardous and non-irritation, containing no substances of very high concern. S-425 is Boron, Formaldehyde, and Secondary Amine free.