BIS lignin sulfonate or Lignosulfonate is an all-natural, water-soluble product that can be used for many different binding applications and returned to the land with no harmful effects on the environment. We never add anything to dilute our product, which means you get what you pay for – pure lignin with a guaranteed analysis of 50% solids (+/- 2%) everyday – guaranteed. This natural by-product is produced through the pulping process from sustainable hardwood.