Jotamastic 80 Comp B is the specific polyamine curing agent designed exclusively for use as Component B with the Jotamastic 80 base component. When properly combined with Component A, it initiates the chemical reaction required to form a tough, highly surface-tolerant, and corrosion-resistant epoxy mastic film. This hardener component is vital to achieving the product’s high-solids structure, ensuring optimal curing performance and robust protection on carbon steel surfaces. It is packaged and measured precisely to match the mixing ratios required for either the Standard or Wintergrade versions of the coating system.