Zero Odor seeks out and bonds with odor molecules of just about every kind, changing them into molecules that can no longer cause odor. Immediately after spraying, Zero Odor leaves behind a “Tracer Scent” that helps you know where Zero Odor has been sprayed. A short time after Zero Odor is sprayed the Tracer Scent will disappear. Patented formulation eliminates odors at the molecular level. Odors disappear from surfaces, fabric, carpets and in the air. Leaves no scent. Non-toxic and non-allergen.