HYPRO®️ Reactive Liquid Polymer is a low molecular weight synthetic rubber with chemical functionality. These reactive additives incorporate rubber properties into epoxies, acrylates, vinyl esters and polyesters. They improve the toughness and low-temperature properties in coatings, adhesives, sealants and composites. HYPRO® reactive liquid polymers are butadiene homo-polymers and butadiene-acrylonitrile copolymers with terminal functionality.