For tough odors, such as sewage, smoke, decay, putrefaction, and more, turn to the powerful odor-fighting abilities of ODORx C.O.C. (Crystal Odor Counteractant). This amazing blend of chemical odor neutralizers and natural absorbents effectively removes odors in insulation, wall cavities, ceiling voids, and other hard-to-reach areas. C.O.C. is a blend of odor control essential oils and evaporative control agents that are immobilized on a solid, absorbent supporting crystal. When C.O.C. is exposed to the air, its time release formulation allows odor control agents to get into the air. ODORx C.O.C. provides long-lasting odor control. This ready-to-use product is commercial strength and intended for professional use.