Zero Odor – Litter Odor Eliminator - Patented Molecular Technology - Pet Safe & Works on all types of litter, 64oz RefillRemove Cat Pee Smells Eliminate Soiled Kitty Litterbox odors. Designed to use with clay and clumping litter Eliminate Odors, Don'r Cover Them Zero Odor Does not Mask or Cover Up Odors with Fragrances or Perfumes. Don't just temporarily cover the smells with perfumes eliminate them Temporary tracer scent helps consumers know where they have sprayed, and quickly disappears SAFE: containing no Bleach or Chlorine whatsoever Spray in the air and on