Harcryl® is the registered trademark for Harcros Organics line of reactive acrylic monomers. These are comprised of a line of phosphated or boronated acrylic monomers used as a component of polymers for paints and other coatings. When included in such polymers, Harcryl® monomers improve adhesion to difficult substrates, improve fire retardancy, and help reduce corrosion. They are also used in radiation curable compositions, where they also improve adhesion, flexibility, and improve curing rates. Typical inclusion rates are from 2 to 8% of the polymer composition.